Marc Randall Shapiro, MD
Internal Medicine Physician · Clearlake, CA
Marc Randall Shapiro, MD is an internal medicine physician with a practice address in Clearlake, California, and NPI 1740217348, issued on Jun 27, 2006. Check the license (California G343590, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marc Randall Shapiro
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G343590 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Emerson St, Clearlake, CA 95422
- Phone
- (707) 994-7241
- Enumerated
- Jun 27, 2006
- Record last updated
- Aug 28, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (707) 994-0870
- Medicaid ID
- 00G343590 CA
- Medicare enrollment
- Enrolled (PECOS I20050728000635); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3400 Emerson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Timothy Young, M.D.Ophthalmology Physician1710984422
Verify Marc Randall Shapiro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G343590Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
29 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 78.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 3 group practices
- Adventist Health Clearlake Hospital Inc.Clearlake, CA
- Ukiah Adventist HospitalUkiah, CA
- Willits Hospital IncWillits, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc Randall Shapiro among 17,696 internal medicine physician records in California
Marc Randall Shapiro, MD 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1976 · median 2004 among the 11,065 with a school on file
- Record last updated2009 · 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).
5 internal medicine physician records list a practice address in Clearlake
They are 5 of the 321 NPPES records with a practice address in Clearlake, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Clearlake → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Manush Ghazaryan, MDClearlake, CA 954221548962566
- Raymond Jennings, MDClearlake, CA 954221386659167
- Eric Kim, MDClearlake, CA 954221578660916
- Milagros Tolentino, MDClearlake, CA 954221245212505
- Niranjana Parthasarathi, MDCloverdale, CA 954251134185473
- Maria Danilychev, M.D.Covelo, CA 954281255419800
- Snehal Raisoni, MDCovelo, CA 954281487973798
- Marianne Kramer, MDSonoma, CA 954311801848601
Common questions
What is Marc Randall Shapiro, MD's NPI number?
Marc Randall Shapiro, MD's National Provider Identifier (NPI) is 1740217348, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marc Randall Shapiro, MD located?
The NPPES record lists a practice address at 3400 Emerson St, Clearlake, CA, 95422. Phone: (707) 994-7241. Providers update this record themselves, so call before visiting.
How can I verify Marc Randall Shapiro, MD's license?
NPPES lists California license number G343590, 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 Marc Randall Shapiro, MD prescribe under Medicare Part D?
In 2024, Marc Randall Shapiro, MD had 29 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Marc Randall Shapiro, MD's MIPS final score?
The 2023 MIPS final score is 78.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.