Mark Gerard Spybrook, M.D.
Internal Medicine Physician · Sacramento, CA
Mark Gerard Spybrook, M.D. is an internal medicine physician with a practice address in Sacramento, California, and NPI 1801927835, issued on Mar 9, 2007. Check the license (California A75057, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Gerard Spybrook
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A75057 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6600 Bruceville RD, Sacramento, CA 95823
- Phone
- (916) 688-6603
- Enumerated
- Mar 9, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (916) 688-6842
- Medicare enrollment
- Enrolled (PECOS I20101216001014); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 6600 Bruceville RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Gerard Spybrook in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A75057Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
11 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Gerard Spybrook among 17,696 internal medicine physician records in California
Mark Gerard Spybrook, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1999 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
601 internal medicine physician records list a practice address in Sacramento
They are 601 of the 33,083 NPPES records with a practice address in Sacramento, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Sacramento → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Keith Andrews, M.D.Sacramento, CA 958231720168016
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- Jestin Cheng, MDSacramento, CA 958231083792725
- Tri-Dung Hoang, M.D.Sacramento, CA 958231043268014
- Tom Koga, MDSacramento, CA 958231881772507
- Eleanor Lo, MDSacramento, CA 958231508944224
- Hung-Anh Nguyen, MDSacramento, CA 958231871594036
- Dean Rinard, M.D.Sacramento, CA 958231043311335
Common questions
What is Mark Gerard Spybrook, M.D.'s NPI number?
Mark Gerard Spybrook, M.D.'s National Provider Identifier (NPI) is 1801927835, issued on Mar 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark Gerard Spybrook, M.D. located?
The NPPES record lists a practice address at 6600 Bruceville RD, Sacramento, CA, 95823. Phone: (916) 688-6603. Providers update this record themselves, so call before visiting.
How can I verify Mark Gerard Spybrook, M.D.'s license?
NPPES lists California license number A75057, 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.
How much does Mark Gerard Spybrook, M.D. prescribe under Medicare Part D?
In 2024, Mark Gerard Spybrook, M.D. had 11 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.