Individual provider Active NPI

Maxim Lee Ritzenberg, M.D.

  • Emergency Medicine Physician
  • San Francisco, CA
National Provider Identifier
1669748158
Registry record updated Aug 7, 2015
On this page

Key facts

NPPES NPI Registry
Primary specialty
Emergency Medicine PhysicianTaxonomy code 207P00000X
License
128625 Issued in CA
Practice address
505 Parnassus Ave
Room M24
San Francisco, CA 94143-0208
Phone
(415) 742-1264
NPI assigned
Mar 28, 2012
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 7, 2015

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Emergency Medicine Physician 207P00000X 128625 CA Primary

Addresses

Primary practice location

505 Parnassus Ave
Room M24
San Francisco, CA 94143-0208

Mailing address

505 Parnassus Ave
Room M24
San Francisco, CA 94143-0208
Phone (415) 742-1264

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20160211001521 CA Practitioner - Emergency Medicine 1850695826 Reassigns benefits to 7 organizations

Care Compare profile

Medicare Care Compare
Specialty
Emergency Medicine
Education
Columbia University College of Physicians and Surgeons, 2012
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
UCSF Health Medical FoundationGroup PAC ID 9436239878, 65 clinicians
County of Santa ClaraGroup PAC ID 1254244973, 1,000 clinicians

Practice addresses (Care Compare)

1310 El Camino Real
Suite I J
San Bruno, CA 94066-1305
Phone (650) 270-2395

199 W Portal Ave
San Francisco, CA 94127-1305
Phone (415) 821-8798

2288 Market St
San Francisco, CA 94114-1506
Phone (415) 964-4855

2395 Lombard St
San Francisco, CA 94123-2601
Phone (415) 796-2242

2895 Diamond St
San Francisco, CA 94131-3004
Phone (415) 964-4866

325 Gellert Blvd
Daly City, CA 94015-2613
Phone (650) 270-2394

3838 California St
RM 111
San Francisco, CA 94118-1504
Phone (415) 221-6476

3900 Piedmont Ave
Oakland, CA 94611-5352
Phone (415) 432-7899

747 52ND St
Oakland, CA 94609-1809
Phone (510) 428-3000

750 Redwood Hwy Frontage Rd
Suite 1204
Mill Valley, CA 94941-2483
Phone (415) 384-4778

750 S Bascom Ave
Vly HLTH Cen Bascom
San Jose, CA 95128-2603
Phone (408) 885-5000

830 Jefferson Ave
Redwood City, CA 94063-1804
Phone (650) 381-0616

Hospital & facility affiliations

  • Zuckerberg San Francisco General Hosp & Trauma Ctr Hospital, San Francisco, CA, CCN 050228

Merit-based Incentive Payment System (MIPS)

Final score
97.28 of 100Reported as group
Quality
89.92
Promoting interoperability
100
Improvement activities
40
Cost
78.23

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Permanente Medical Group, Inc CurrentSince Jan 5, 2016 Accepting new patients
University of California SFGH Medical Group CurrentSince Jun 20, 2016 Accepting new patients
UCSF Health Medical Foundation CurrentSince Jan 23, 2025 Accepting new patients
City & County of San Francisco Current Accepting new patients
University of California SFGH Medical Group Current Accepting new patients
Emergency Physicians Associates Fremont PC Emergency Medicine CurrentSince May 4, 2025 Accepting new patients
City & County of San Francisco CurrentSince Mar 1, 2020 Accepting new patients
Permanente Medical Group Inc Emergency Medicine CurrentSince Jan 5, 2016 Accepting new patients
Emergency Physicians Associates San Jose PC Emergency Medicine CurrentSince Apr 25, 2025 Accepting new patients
County of Santa Clara Current Accepting new patients
City and County of San Francisco CurrentSince Mar 1, 2020 Accepting new patients
University of California SFGH Medical Group Emergency Medicine CurrentSince Jun 20, 2016 Accepting new patients
County of Santa Clara CurrentSince Feb 1, 2025 Accepting new patients
Permanente Medical Group Inc Emergency Medicine Current Accepting new patients
County of Santa Clara CurrentSince Feb 1, 2025 Accepting new patients

Locations (25 of 29)

750 Auburn Ravine Rd
Auburn, CA 95603
Phone (530) 823-6131

2000 Mowry Ave
Fremont, CA 94538
Phone (510) 793-6653

4753 W Shaw Ave
Ste 101
Fresno, CA 93722
Phone (559) 277-8738

7475 Camino Arroyo
Gilroy, CA 95020
Phone (408) 852-2400

900 N Douty St
Hanford, CA 93230
Phone (559) 587-9014

747 52nd St
Oakland, CA 94609
Phone (510) 428-3070

101 Monroe St
Petaluma, CA 94954
Phone (707) 763-4109

1150 Veterans Blvd
Redwood City, CA 94063
Phone (650) 299-2015

901 Nevin Ave
Richmond, CA 94801
Phone (510) 307-1500

930 W Main St
Ripon, CA 95366
Phone (209) 599-4221

2401 Keith St
San Francisco, CA 94124
Phone (415) 671-7000

1001 Potrero Ave
Ste 7M8
San Francisco, CA 94110
Phone (415) 206-3325

505 Parnassus Ave
Rm M24
San Francisco, CA 94143
Phone (415) 353-1529

2200 Ofarrell St
San Francisco, CA 94115
Phone (415) 202-2000

2895 Diamond St
San Francisco, CA 94131
Phone (415) 964-4866

1001 Potrero Ave
San Francisco, CA 94110
Phone (415) 206-2305

1001 Potrero Ave
Bldg 5
San Francisco, CA 94110
Phone (628) 206-5753

3838 California St
Rm 111
San Francisco, CA 94118
Phone (415) 221-6476

250 Hospital Pkwy
San Jose, CA 95119
Phone (408) 972-6320

750 S Bascom Ave
San Jose, CA 95128
Phone (408) 885-2320

500 Tully Rd
San Jose, CA 95111
Phone (408) 817-1433

2105 Forest Ave
San Jose, CA 95128
Phone (408) 947-2500

751 S Bascom Ave
San Jose, CA 95128
Phone (408) 885-5110

1993 McKee Rd
San Jose, CA 95116
Phone (408) 254-6320

710 Lawrence Expy
Santa Clara, CA 95051
Phone (408) 236-6400

Organizations & group practices 15

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

View all 15

Hospital & facility affiliations 2

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1332892800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1438905600000",
    "number": "1669748158",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "505 PARNASSUS AVE",
            "address_2": "ROOM M24",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941430208",
            "telephone_number": "415-742-1264"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "505 PARNASSUS AVE",
            "address_2": "ROOM M24",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941430208",
            "telephone_number": "415-742-1264"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "RITZENBERG",
        "first_name": "MAXIM",
        "middle_name": "LEE",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2012-03-28",
        "last_updated": "2015-08-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CA",
            "license": "128625",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in San Francisco, CA

Sources for this page

Verify at the official NPI Registry.