Nils Thomas Ahlberg, MD

Primary specialty

Anesthesiology PhysicianTaxonomy code 207L00000X

License

A36935 Issued in CA

Practice address

900 Hyde St
San Francisco, CA 94109-4806

Phone

(415) 353-6000

NPI assigned

May 12, 2006

Last updated

Jul 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

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

Specialty

Anesthesiology

Education

Other, 1979

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Anesthesiologists Medical Group of San Francisco Inc.Group PAC ID 8820986508, 16 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• UCSF Health Saint Francis Hospital Hospital, San Francisco, CA, CCN 050152

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

All facility ownership & control disclosures 1

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

Owned or controlled facilities with NPI records 1

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

• UCSF Health Community Hospitals

  dba UCSF Health Hyde Hospital

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1316061997

  Corporate Director

  CMS ownership

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.

• Anesthesiologists' Medical Group of San Francisco, Inc.

  • Anesthesiology Physician
  • San Francisco, CA
  • NPI 1154379436
  Medicare reassignment Care Compare group NPD
• UCSF Health Community Hospitals

  dba UCSF Health Hyde Hospital

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1316061997
  NPD (past)

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

• UCSF Health Community Hospitals

  dba UCSF Health Hyde Hospital

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1316061997
  Care Compare affiliation

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

{
    "created_epoch": "1147392000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1831149400",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7793",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941207793",
            "telephone_number": "503-372-2740",
            "fax_number": "503-372-2754"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "900 HYDE ST",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941094806",
            "telephone_number": "415-353-6000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "AHLBERG",
        "first_name": "NILS",
        "middle_name": "THOMAS",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-12",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "CA",
            "license": "A36935",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A369350",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Nana-Adwoa Agyarkowah, MD
• Whitney Ahema Agyekum
• Ashley Ahern, M.S., CF-SLP
• Kelsey Irene Mary Ahern, M.S. CCC-SLP
• Michael J Ahern, MFT
• Kyle O Ahlers, ASW
• Caroline E Ahlquist, PA-C
• Julie Ann Ahlrich, FNP-BC
• Ferhad Ahmad, MD
• Maimuna Sayeeda Ahmad, MD

• Anesthesiology Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Anesthesiology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; facility enrollments, owners and changes of ownership; Provider of Services certification data; 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.