Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOHN R GREENLAND M.D., PH.D.
NPI 1124290853
Internal Medicine - Pulmonary Disease in San Francisco, CA

Q: What is John Greenland's NPI number?

The NPI number for John Greenland is 1124290853. It was assigned to this individual provider in the NPPES registry on April 2, 2008.

Q: What is John Greenland's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Q: When was this NPI record last updated?

The NPPES record for John Greenland was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 02, 2008

4150 CLEMENT ST, SAN FRANCISCO, CA 94121(415) 221-4810 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Sep 29, 2026, Mar 16, 2023 (2 updates tracked since 2023).

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About Dr. John R Greenland M.d., Ph.d. NPPES

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

DR. JOHN R GREENLAND M.D., PH.D. (NPI 1124290853) is an individual pulmonary disease provider in San Francisco, California, licensed in California (A111543) and active in the NPI registry since April 2008.

NPPES Registry Identity

NPI1124290853

Entity TypeIndividualMale

Primary Taxonomy207RP1001X

Provider Legal NameDR. JOHN R GREENLANDCredential: M.D., PH.D.

Location Address4150 CLEMENT STSan Francisco, CA 94121-1563

Mailing Address4150 Clement StSan Francisco, CA 94121-1563 · (415) 221-4810

Phone(415) 221-4810

Sole ProprietorNo

Enumeration DateApril 2, 2008

Last NPPES UpdateSeptember 29, 20262 updates tracked since enumeration

NPPES CertifiedSeptember 29, 2026

✔ NPI 1124290853 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RP1001X

License✔ Licensed in CA · A111543

Definition

An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.

Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License A111543 (CA)

4150 CLEMENT ST, San Francisco, CA 94121

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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.

MR. SHANNON KISSINGER MSW

Social Worker