Frederick William Penczak, MD
Surgery Physician · San Rafael, CA
Frederick William Penczak, MD is a surgery physician with a practice address in San Rafael, California, and NPI 1841379070, issued on Nov 6, 2006. Check the license (California 00A685120, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Frederick William Penczak
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 00A685120 CA
Self-reported in NPPES; status is on the state search - Practice location
- 78 Creekside Dr, San Rafael, CA 94903
- Phone
- (707) 939-7411
- Enumerated
- Nov 6, 2006
- Record last updated
- Apr 25, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (707) 939-1617
- Medicaid ID
- 00A685120 CA
- Medicare enrollment
- Enrolled (PECOS I20040421000882); accepts Medicare assignment
- Medical or professional school
- Medical College Of Pennsylvania, 1999
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Verify Frederick William Penczak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 00A685120Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Frederick William Penczak among 3,118 surgery physician records in California
Frederick William Penczak, MD is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileNo · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1999 · median 2003 among the 1,901 with a school on file
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,118 in California → Every provider in San Rafael → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Edward Banks, MDSan Rafael, CA 949031871677856
- Richard GeistSan Rafael, CA 949031245418086
- Mary Mockus, MDSan Rafael, CA 949031134203128
- Kenneth Novich, MDSan Rafael, CA 949031851475826
- Michael Parnes, MDSan Rafael, CA 949031619051687
- Joe Zimmerman, MDSan Rafael, CA 949031306920376
- John Maa, MDGreenbrae, CA 949041356305866
- Mark Peterson, MDGreenbrae, CA 949041831130863
Common questions
What is Frederick William Penczak, MD's NPI number?
Frederick William Penczak, MD's National Provider Identifier (NPI) is 1841379070, issued on Nov 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Frederick William Penczak, MD located?
The NPPES record lists a practice address at 78 Creekside Dr, San Rafael, CA, 94903. Phone: (707) 939-7411. Providers update this record themselves, so call before visiting.
How can I verify Frederick William Penczak, MD's license?
NPPES lists California license number 00A685120, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.