Robert Marcial Guerra, M.D.
Internal Medicine Physician · Lompoc, CA
Robert Marcial Guerra, M.D. is an internal medicine physician with a practice address in Lompoc, California, and NPI 1518988062, issued on Jul 21, 2006. Check the license (California G65335, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Marcial Guerra
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G65335 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 N R St, Lompoc, CA 93436
- Phone
- (805) 737-6400
- Enumerated
- Jul 21, 2006
- Record last updated
- Mar 13, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (805) 737-6430
- Medicaid ID
- 00G653350 CA
- Medicare enrollment
- Enrolled (PECOS I20040415001021); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1987
- Entity
- Type 1 · individual
Also registered at 301 N R St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sarah Adams, LCSWClinical Social Worker1245375500
- Gowthamy Balakumaran, M.D.Pediatrics Physician1396754636
- Kelley Barragan, RNRegistered Nurse1801208525
- Edith Foley, MDInternal Medicine Physician1770698698
- Andrew Frerking, D.O.Family Medicine Physician1477969996
- Howard Gregersen, M.D.Internal Medicine Physician1467474999
Verify Robert Marcial Guerra in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G65335Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
71 Medicare Part D claims for 36 beneficiaries, 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
- Santa Barbara County AuditorSanta Maria, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
14 internal medicine physician records list a practice address in Lompoc
They are 14 of the 795 NPPES records with a practice address in Lompoc, and 17,696 internal medicine physician records in California.
All 14 in Lompoc → All 17,696 in California → Every provider in Lompoc →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Robert Marcial Guerra, M.D.'s NPI number?
Robert Marcial Guerra, M.D.'s National Provider Identifier (NPI) is 1518988062, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Marcial Guerra, M.D. located?
The NPPES record lists a practice address at 301 N R St, Lompoc, CA, 93436. Phone: (805) 737-6400. Providers update this record themselves, so call before visiting.
How can I verify Robert Marcial Guerra, M.D.'s license?
NPPES lists California license number G65335, 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 Robert Marcial Guerra, M.D. prescribe under Medicare Part D?
In 2024, Robert Marcial Guerra, M.D. had 71 Medicare Part D claims for 36 beneficiaries; 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.