Maher Tama, M.D.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

A161762 Issued in CA

Practice address

1479 Ygnacio Valley Rd Ste 150
Walnut Creek, CA 94598-2954

Phone

(925) 296-7340

NPI assigned

Jul 23, 2012

Last updated

Jan 20, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in CA, IL2 enrollments

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 2

Specialty

Gastroenterology

Education

Other, 2011

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Faculty Physicians and Surgeons of LlusmGroup PAC ID 1153227814, 1,313 clinicians

John Muir Physician NetworkGroup PAC ID 6608789813, 488 clinicians

Loyola University Medical CenterGroup PAC ID 3779488903, 917 clinicians

Chaparral Medical Group IncGroup PAC ID 6800709403, shared by 2 NPIs, 66 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• John Muir Medical Center - Concord Campus Hospital, Concord, CA, CCN 050496
• Riverside University Health System-Medical Center Hospital, Moreno Valley, CA, CCN 050292
• Loyola Gottlieb Memorial Hospital Hospital, Melrose Park, IL, CCN 140008
• Loyola University Medical Center Hospital, Maywood, IL, CCN 140276
• Loma Linda University Medical Center Hospital, Loma Linda, CA, CCN 050327

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mtama700786@direct.llu.edu
• Direct secure messaging: mtama904114@direct.memorialcare.org
• Direct secure messaging: tmaher65688@enloedirect.org

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

• Faculty Physicians and Surgeons of Llusm

  • Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
  • Apple Valley, CA
  • NPI 1205009917
  Medicare reassignment Care Compare group NPD
• John Muir Physician Network

  • General Practice Physician
  • Walnut Creek, CA
  • NPI 1841407665
  Medicare reassignment Care Compare group NPD
• Loyola University Medical Center

  • General Practice Physician
  • Maywood, IL
  • NPI 1336159961
  Medicare reassignment Care Compare group NPD
• Chaparral Medical Group, Inc.

  • Dermatology Physician
  • Rancho Cucamonga, CA
  • NPI 1093777666

  Internal Medicine

  Medicare reassignment NPD
• Chaparral Medical Group, Inc.

  • Orthopaedic Surgery Physician
  • Pomona, CA
  • NPI 1477733624
  Medicare reassignment NPD
• Enloe Medical Center

  dba Enloe Digestive Diseases Clinic

  • Gastroenterology Physician
  • Chico, CA
  • NPI 1801226162
  Medicare reassignment NPD
• Chaparral Medical Group Inc

  • Endocrinology, Diabetes & Metabolism Physician
  • Claremont, CA
  • NPI 1376506956

  Internal Medicine

  NPD
• Chaparral Medical Group Inc.

  • Cardiovascular Disease Physician
  • Upland, CA
  • NPI 1639869605
  NPD
• Chaparral Medical Group, Inc.

  • Cardiovascular Disease Physician
  • Chino, CA
  • NPI 1821554866

  Internal Medicine

  NPD
• Enloe Medical Center

  dba Enloe Op Center Pharmacy

  • Community/Retail Pharmacy
  • Chico, CA
  • NPI 1912949538
  NPD
• Faculty Physicians and Surgeons of Llusm

  • Neurological Surgery Physician
  • Loma Linda, CA
  • NPI 1194775122
  NPD
• Faculty Physicians and Surgeons of Llusm

  • Ophthalmology Physician
  • Loma Linda, CA
  • NPI 1437109469
  NPD

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

• County of Riverside

  • General Acute Care Hospital
  • Moreno Valley, CA
  • NPI 1821159195
  Care Compare affiliation
• John Muir Health

  dba John Muir Health Medical Center, Concord Campus

  • General Acute Care Hospital
  • Concord, CA
  • NPI 1801821376
  Care Compare affiliation
• Loma Linda University Medical Center

  • General Acute Care Hospital
  • Loma Linda, CA
  • NPI 1194731935
  Care Compare affiliation
• Gottlieb Memorial Hospital

  • General Acute Care Hospital
  • Melrose Park, IL
  • NPI 1831170232
  Care Compare affiliation
• Loyola University Medical Center

  dba Foster G. McGaw Hospital

  • General Acute Care Hospital
  • Maywood, IL
  • NPI 1376521575
  Care Compare affiliation
• Loyola University Medical Center

  dba Loyola University Medical Center Cancer Center

  • General Acute Care Hospital
  • Tinley Park, IL
  • NPI 1427752013
  Care Compare affiliation

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

{
    "created_epoch": "1343001600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768867200000",
    "number": "1326393737",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1450 TREAT BLVD STE 300",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945972168",
            "telephone_number": "925-952-2828"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1479 YGNACIO VALLEY RD STE 150",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945982954",
            "telephone_number": "925-296-7340"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TAMA",
        "first_name": "MAHER",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2012-07-23",
        "last_updated": "2026-01-20",
        "certification_date": "2026-01-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A161762",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "A161762",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ludwiga T. Taloma, MD
• Alexandra Talwar
• Courtney Wen-Lun Tam, MD
• Richard Tam
• Trista Tam
• Madison Tamayo
• Tampico Healthcare Center LLC
• Jesse D Tamplen, L.C.S.W.
• Sharrukina Tamrazi
• Geraldine Gan Tan, MD

• Gastroenterology Physician in Walnut Creek, CA
• Providers in Walnut Creek, CA by specialty
• Gastroenterology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 20, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.