DR. CATHERINE KOSS M.D.
NPI 1861727950
Internal Medicine - Infectious Disease in San Francisco, CA

Q: What is Catherine Koss's NPI number?

The NPI number for Catherine Koss is 1861727950. It was assigned to this individual provider in the NPPES registry on October 8, 2009.

Q: What is Catherine Koss's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Q: When was this NPI record last updated?

The NPPES record for Catherine Koss was last updated on May 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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 October 08, 2009PECOS Enrolled

UCSF DEPARTMENT OF MEDICINE, 505 PARNASSUS AVENUE, SAN FRANCISCO, CA 94143(415) 476-1528 Get Directions Write a Review

NPPES record last updated: May 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 13, 2026, May 6, 2019 (2 updates tracked since 2019).

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About Dr. Catherine Koss M.d. NPPES

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

DR. CATHERINE KOSS M.D. (NPI 1861727950) is an individual infectious disease provider in San Francisco, California, licensed in California (A115493) and active in the NPI registry since October 2009. She is enrolled in Medicare PECOS and maintains a secondary practice location in San Francisco.

NPPES Registry Identity

NPI1861727950

Entity TypeIndividualFemale

Primary Taxonomy207RI0200X

Provider Legal NameDR. CATHERINE KOSSCredential: M.D.

Location AddressUCSF DEPARTMENT OF MEDICINE, 505 PARNASSUS AVENUESan Francisco, CA 94143-0001

Mailing AddressUcsf Department Of Medicine, 505 Parnassus AvenueSan Francisco, CA 94143-0001

Phone(415) 476-1528

Sole ProprietorNo

Enumeration DateOctober 8, 2009

Last NPPES UpdateMay 13, 20262 updates tracked since enumeration

NPPES CertifiedMay 13, 2026

✔ NPI 1861727950 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

License✔ Licensed in CA · A115493

Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

Also ListedInternal MedicineTaxonomy 207R00000X · License A115493 (CA)

UCSF DEPARTMENT OF MEDICINE, San Francisco, CA 94143

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Secondary Practice Location 1

Location 1995 Potrero Ave., Bldg. 80, Ward 86, Fl. 6San Francisco, CA 94110-3518 · Phone (628) 206-2400 · Fax (628) 206-7514

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Catherine Koss M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 6

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

THO BOI TRAN MD

Student in an Organized Health Care Education/Training Program

UCSF DEPARTMENT OF MEDICINE, 505 PARNASSUS AVE., M1480
SAN FRANCISCO, CA 94143

San Francisco County (415) 476-1528

SARAH DOERNBERG MD

Internal Medicine

UCSF DEPARTMENT OF MEDICINE, 505 PARNASSUS AVE, ROOM M987
SAN FRANCISCO, CA 94143

San Francisco County (415) 476-1528

CLAUDIA SEE MD, MBA

Student in an Organized Health Care Education/Training Program

UCSF DEPARTMENT OF MEDICINE, 505 PARNASSUS AVE M1480
SAN FRANCISCO, CA 94143

San Francisco County (415) 476-1528

GINO MICHAEL DETTORRE MD

Student in an Organized Health Care Education/Training Program

UCSF DEPARTMENT OF MEDICINE, 505 PARNASSUS AVE, M1480
SAN FRANCISCO, CA 94143

San Francisco County (415) 476-1528

MARY ELIZABETH JAME

Student in an Organized Health Care Education/Training Program

UCSF DEPARTMENT OF MEDICINE, 505 PARNASSUS AVENUE, ROOM M-987
SAN FRANCISCO, CA 94143

San Francisco County (415) 476-1528

NITIKA GUPTA MD

Student in an Organized Health Care Education/Training Program

UCSF DEPARTMENT OF MEDICINE, 505 PARNASSUS AVE, M1480
SAN FRANCISCO, CA 94143

San Francisco County (415) 476-1528

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Catherine Koss's NPI number?

The NPI number for Catherine Koss is 1861727950. It was assigned to this individual provider in the NPPES registry on October 8, 2009.

Where is Catherine Koss located?

Catherine Koss practices at Ucsf Department Of Medicine 505 Parnassus Avenue, San Francisco, CA 94143. The listed phone number is (415) 476-1528.

What is Catherine Koss's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Catherine Koss enrolled in Medicare?

Yes. Catherine Koss is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Catherine Koss was last updated on May 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.