Nana Ama Barnes, MD
Internal Medicine Physician · Rohnert Park, CA
Nana Ama Barnes, MD is an internal medicine physician with a practice address in Rohnert Park, California, and NPI 1063900520, issued on Apr 30, 2018. Check the license (California A173974, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nana Ama Barnes
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A173974 CA
APP-000143836 OH
Self-reported in NPPES; status is on the state search - Practice location
- 5900 State Farm Dr, Rohnert Park, CA 94928
- Phone
- (707) 303-3600
- Enumerated
- Apr 30, 2018
- Record last updated
- Mar 27, 2024
- Fax
- (707) 303-3611
- Medicare enrollment
- Enrolled (PECOS I20230307001209); 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 5900 State Farm Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aimee Aiken, MDPediatrics Physician1083803134
- Howard Ballinger, MDOccupational Medicine Physician1164506143
- Sandy Batarseh, PHARMDPharmacist1720512288
- Roseanne Beers, MDFamily Medicine Physician1447334412
- Ronald Bruce, MDFamily Medicine Physician1275617342
- Michael Bunce, MDInternal Medicine Physician1740369875
Verify Nana Ama Barnes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A173974Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% more Medicare Part D claims than the average internal medicine physician in 2024
5,472 Medicare Part D claims for 1,582 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 348 claims were for opioids.
Most prescribed
- Atorvastatin Calcium307 claims
- Levothyroxine Sodium275 claims
- Hydrocodone-Acetaminophen204 claims
- Lisinopril185 claims
- Losartan Potassium184 claims
- Amlodipine Besylate169 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.
Bills Medicare through one group practice
- Permanente Medical Group IncRohnert Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nana Ama Barnes among 17,696 internal medicine physician records in California
Nana Ama Barnes, 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 2018, is newer than 84% of them.
- NPI issued2018 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2005 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 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).
9 internal medicine physician records list a practice address in Rohnert Park
They are 9 of the 483 NPPES records with a practice address in Rohnert Park, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Rohnert Park → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michael Bunce, MDRohnert Park, CA 949281740369875
- Sara Ganeless Levine, MDRohnert Park, CA 949281326122490
- Steven Gelber, M.D.Rohnert Park, CA 949281144495326
- Paul Johnson, MDRohnert Park, CA 949281881778876
- Hyejo Jun, MDRohnert Park, CA 949281982946547
- Arnold Loo, D.O.Rohnert Park, CA 949281063716918
- Nicholas Regennitter, MDRohnert Park, CA 949281013591031
- Bridgit Travinsky, M.D.Rohnert Park, CA 949281295153930
Common questions
What is Nana Ama Barnes, MD's NPI number?
Nana Ama Barnes, MD's National Provider Identifier (NPI) is 1063900520, issued on Apr 30, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Nana Ama Barnes, MD located?
The NPPES record lists a practice address at 5900 State Farm Dr, Rohnert Park, CA, 94928. Phone: (707) 303-3600. Providers update this record themselves, so call before visiting.
How can I verify Nana Ama Barnes, MD's license?
NPPES lists California license number A173974, 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 Nana Ama Barnes, MD prescribe under Medicare Part D?
In 2024, Nana Ama Barnes, MD had 5,472 Medicare Part D claims for 1,582 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.