Gary P. Barth, M.D.
Ophthalmology Physician · Healdsburg, CA
Gary P. Barth, M.D. is an ophthalmology physician with a practice address in Healdsburg, California, and NPI 1992783237, issued on Jan 6, 2006. Check the license (California G34382, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary P. Barth
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- G34382 CA
Self-reported in NPPES; status is on the state search - Practice location
- 640 Healdsburg Ave, Healdsburg, CA 95448
- Phone
- (707) 955-1120
- Enumerated
- Jan 6, 2006
- Record last updated
- Oct 14, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (707) 955-1135
- Medicaid ID
- 00G343820 CA
- Medicare enrollment
- Enrolled (PECOS I20080718000586); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1977
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 640 Healdsburg Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anjali Patel, ODStudent in an Organized Health Care Education/Training Program1649960865
Verify Gary P. Barth in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G34382Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average ophthalmology physician in 2024
391 Medicare Part D claims for 153 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Latanoprost86 claims
- Prednisolone Acetate52 claims
- Diclofenac Sodium26 claims
- Timolol Maleate25 claims
- Ciprofloxacin Hcl18 claims
- Brimonidine Tartrate15 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 MIPS final score for 2023 (Medicare payment program): 61.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $99.64
4 payments; by number, the most common kind was food and beverage; the largest payer was RxSight Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Gary P. Barth among 2,899 ophthalmology physician records in California
Gary P. Barth, M.D. is one of 2,899 ophthalmology 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 9% of them.
- NPI issued2006 · 9% of these records are older, 45% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1977 · median 2001 among the 1,907 with a school on file
- Record last updated2020 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Healdsburg → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Robert Nelson, MDGualala, CA 954451104962638
- Alan Sampson, M.D.Lakeport, CA 954531518046754
- Eric Kahle, M.D.Sebastopol, CA 954721578541900
- Delmer Fjarli, M.D.Clearlake, CA 954221154783421
- Edward Kondrot, MDClearlake, CA 954221497368336
- Timothy Young, M.D.Clearlake, CA 954221710984422
- Daniel Ahn, D.O.Sonoma, CA 954761932416781
- Thomas Dixon, MDSonoma, CA 954761558437152
Common questions
What is Gary P. Barth, M.D.'s NPI number?
Gary P. Barth, M.D.'s National Provider Identifier (NPI) is 1992783237, issued on Jan 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary P. Barth, M.D. located?
The NPPES record lists a practice address at 640 Healdsburg Ave, Healdsburg, CA, 95448. Phone: (707) 955-1120. Providers update this record themselves, so call before visiting.
How can I verify Gary P. Barth, M.D.'s license?
NPPES lists California license number G34382, 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 Gary P. Barth, M.D. prescribe under Medicare Part D?
In 2024, Gary P. Barth, M.D. had 391 Medicare Part D claims for 153 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Gary P. Barth, M.D.'s MIPS final score?
The 2023 MIPS final score is 61.4 of 100. 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.