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DR. JOHN DAVID SZUMOWSKI M.D., M.P.H.
NPI 1750558615
Internal Medicine - Infectious Disease in San Francisco, CA

Active since May 09, 2008PECOS EnrolledAccepts Medicare Assignment
91.85/100
CMS Quality Rating
4150 CLEMENT ST, SAN FRANCISCO, CA 94121(415) 221-4810(415) 750-6951 Get Directions Write a Review

NPPES record last updated: August 12, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 12, 2025, Apr 22, 2020 (2 updates tracked since 2020).

About Dr. John David Szumowski M.d., M.p.h. NPPES

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

DR. JOHN DAVID SZUMOWSKI M.D., M.P.H. (NPI 1750558615) is an individual infectious disease provider in San Francisco, California, licensed in California (128301) and active in the NPI registry since May 2008. He is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (2007).

NPPES Registry Identity

NPI1750558615
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameDR. JOHN DAVID SZUMOWSKICredential: M.D., M.P.H.
Location Address4150 CLEMENT STSan Francisco, CA 94121-1563
Mailing Address4150 Clement StSan Francisco, CA 94121-1563 · (415) 221-4810 · Fax (415) 750-6951
Phone(415) 221-4810
Fax(415) 750-6951
Sole ProprietorNo
Medical School CMSHarvard Medical SchoolGraduated 2007
Enumeration DateMay 9, 2008
Last NPPES UpdateAugust 12, 20252 updates tracked since enumeration
NPPES CertifiedAugust 12, 2025
✔ NPI 1750558615 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 · 128301
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 128301 (CA)
4150 CLEMENT ST, San Francisco, CA 94121
Open in Google Maps ↗

Other Identifiers 1

Medicaid1750558615WA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John David Szumowski M.d., M.p.h. 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 ID8729245311
PECOS Enrollment IDI20150119000617
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.

Medicare Billing Reassignments

3

Medicare enrollment records show John Szumowski reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

City & County Of San Francisco
1.8 mi
Primary Care
1351 24TH AVE
San Francisco, CA 94122
  • Reassigned Medicare billing, California enrollment
  • 1,573 clinicians in this Medicare group
NPI 1598705451 (415) 682-1900
University Of California Sfgh Medical Group
5.6 mi
Medical Oncology
995 POTRERO AVE, BLDG.80, RM 229
San Francisco, CA 94110
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1326013442 (California), NPI 1366417933 (California)
  • 637 clinicians in this Medicare group
NPI 1356696215 (415) 476-4082
County Of Santa Clara
32 mi
Mental Health (Including Community Mental Health Center)
231 GRANT AVENUE
Palo Alto, CA 94306
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1043354020 (California)
  • 2,460 clinicians in this Medicare group
NPI 1144330614 (650) 321-5545

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94121 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.85/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality83.53
Promoting Interoperability100
Improvement Activities40
Cost68.01

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
8 suppliers31 claims61 services$5.34 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
7 suppliers21 claims21 services$0.89 avg. paid by Medicare
Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260
DME-Hospital Beds · category DB000N
1 supplier11 claims11 services$41.19 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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
4150 CLEMENT ST
SAN FRANCISCO, CA 94121
San Francisco County (415) 221-4848
MS. AYESHA DELANY-BRUMSEY M.A.
Student in an Organized Health Care Education/Training Program
4150 CLEMENT ST
SAN FRANCISCO, CA 94121
San Francisco County (415) 221-4810
VICTORIA HOA TRAN
Dentist (General Practice)
4150 CLEMENT ST
SAN FRANCISCO, CA 94121
San Francisco County (415) 221-4810
DYLAN LEE PHARMD
Pharmacist
4150 CLEMENT ST
SAN FRANCISCO, CA 94121
San Francisco County (415) 221-4810
AUGUSTUS SICSIC
Respiratory Therapist, Registered
4150 CLEMENT ST
SAN FRANCISCO, CA 94121
San Francisco County (415) 221-4810
MARY CAROLENE SAUR RN
Registered Nurse
4150 CLEMENT ST
SAN FRANCISCO, CA 94121
San Francisco County (415) 221-4810
JOAN DELA CERNA
Registered Nurse
4150 CLEMENT ST
SAN FRANCISCO, CA 94121
San Francisco County (415) 221-4810
MRS. RAMONETTE RAMOS FERNANDES RN
Registered Nurse
4150 CLEMENT ST
SAN FRANCISCO, CA 94121
San Francisco County (415) 221-4810

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 John Szumowski's NPI number?

The NPI number for John Szumowski is 1750558615. It was assigned to this individual provider in the NPPES registry on May 9, 2008.

Where is John Szumowski located?

John Szumowski practices at 4150 Clement St, San Francisco, CA 94121. The listed phone number is (415) 221-4810.

What is John Szumowski's specialty?

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

Is John Szumowski enrolled in Medicare?

Yes. John Szumowski is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for John Szumowski's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Szumowski reassigns Medicare benefits to 3 organizations: City & County Of San Francisco (San Francisco, CA), University Of California Sfgh Medical Group (San Francisco, CA) and County Of Santa Clara (Palo Alto, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Szumowski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for John Szumowski was last updated on August 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.