Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John Charles Pfeffer, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1851456602

John Charles Pfeffer, MD is an Obstetrics & Gynecology Physician in Modesto, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1541 Florida Ave Ste 304
Modesto, CA 95350-4439
Phone: (209) 522-1027
Fax: (209) 529-5398
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence C400620 (CA)

Record details

NPI number1851456602
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 22, 2006
Last updated in NPPESApril 4, 2024
Certification dateApril 4, 2024
Mailing address1400 Florida Ave, Ste. 207, Modesto, CA 95350-4422

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