Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

NILS THOMAS AHLBERG MD
NPI 1831149400
Anesthesiology in San Francisco, CA

Q: What is Nils Ahlberg's NPI number?

The NPI number for Nils Ahlberg is 1831149400. It was assigned to this individual provider in the NPPES registry on May 12, 2006.

Q: What is Nils Ahlberg's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Q: When was this NPI record last updated?

The NPPES record for Nils Ahlberg was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since May 12, 2006PECOS Enrolled

900 HYDE ST, SAN FRANCISCO, CA 94109(415) 353-6000 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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About Nils Thomas Ahlberg Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NILS THOMAS AHLBERG MD (NPI 1831149400) is an individual anesthesiology provider in San Francisco, California, licensed in California (A36935) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1979).

NPPES Registry Identity

NPI1831149400

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameNILS THOMAS AHLBERGCredential: MD

Location Address900 HYDE STSan Francisco, CA 94109-4806

Mailing AddressPo Box 7793San Francisco, CA 94120-7793 · (503) 372-2740 · Fax (503) 372-2754

Phone(415) 353-6000

Sole ProprietorNo

Medical School CMSOtherGraduated 1979

Enumeration DateMay 12, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1831149400 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in CA · A36935

Definition

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

900 HYDE ST, San Francisco, CA 94109

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Other Identifiers 1

Medicaid00A369350CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Nils Thomas Ahlberg Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7517014780

PECOS Enrollment IDI20090406000437

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ANJA OEFLER RPH

Pharmacist