NPIMap

Individual provider Active NPI

Chad York Lewis, MD, MPH

  • Ophthalmology Physician
  • Palo Alto, CA
National Provider Identifier
1407424187
Registry record updated Jul 7, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Ophthalmology PhysicianTaxonomy code 207W00000X
License
A2029132 Issued in CA
Practice address
300 Pasteur Dr
Palo Alto, CA 94305-2200
Phone
(650) 723-4000
NPI assigned
Jun 17, 2021
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 7, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X R-12259 IA
Ophthalmology Physician 207W00000X R-12259 IA
Ophthalmology Physician 207W00000X A2029132 CA Primary

Addresses

Primary practice location

300 Pasteur Dr
Palo Alto, CA 94305-2200

Mailing address

300 Pasteur Dr
Palo Alto, CA 94305-2200
Phone (650) 723-4000

Other practice location 1

200 Hawkins Dr
Iowa City, IA 52242-1009
Phone (319) 353-8585

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20250618003139 CA Practitioner - Ophthalmology 5597168708 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Ophthalmology
Education
Other, 2021
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Stanford Health CareGroup PAC ID 6709797491, 3,152 clinicians

Practice addresses (Care Compare)

300 Pasteur Dr
Stanford, CA 94305-2200
Phone (650) 723-4000

Hospital & facility affiliations

  • Stanford Health Care Hospital, Stanford, CA, CCN 050441

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
A2029132CAMDOphthalmology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Stanford Health Care Internal Medicine Current Accepting new patients
Stanford Health Care CurrentSince Jun 6, 2025 Accepting new patients
Stanford Health Care CurrentSince Jun 6, 2025 Accepting new patients
LPCH Medical Group Div of Lucile CurrentSince Jun 6, 2025 Accepting new patients

Locations

725 Welch Rd
Palo Alto, CA 94304
Phone (650) 497-8979

2452 Watson Ct
Ste 1700
Palo Alto, CA 94303
Phone (650) 723-5281

2452 Watson Ct
Palo Alto, CA 94303
Phone (650) 721-6888

300 Pasteur Dr
Stanford, CA 94305
Phone (650) 498-5710

200 Hawkins Dr
Iowa City, IA 52242
Phone (319) 356-1616

Organizations & group practices 4

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.

Hospital & facility affiliations 7

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": "1623888000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751846400000",
    "number": "1407424187",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 PASTEUR DR",
            "city": "PALO ALTO",
            "state": "CA",
            "postal_code": "943052200",
            "telephone_number": "650-723-4000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 PASTEUR DR",
            "city": "PALO ALTO",
            "state": "CA",
            "postal_code": "943052200",
            "telephone_number": "650-723-4000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "200 Hawkins Dr",
            "address_purpose": "LOCATION",
            "city": "Iowa City",
            "state": "IA",
            "postal_code": "522421009",
            "country_code": "US",
            "telephone_number": "319-353-8585",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LEWIS",
        "first_name": "CHAD",
        "middle_name": "YORK",
        "credential": "MD, MPH",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-06-17",
        "last_updated": "2025-07-07",
        "certification_date": "2025-07-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IA",
            "license": "R-12259",
            "primary": false
        },
        {
            "code": "207W00000X",
            "taxonomy_group": "",
            "desc": "Ophthalmology",
            "state": "IA",
            "license": "R-12259",
            "primary": false
        },
        {
            "code": "207W00000X",
            "taxonomy_group": "",
            "desc": "Ophthalmology",
            "state": "CA",
            "license": "A2029132",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Palo Alto, CA

Sources for this page

Verify at the official NPI Registry.