William John Mark Roach, M.D.
Family Medicine Physician · Visalia, CA
William John Mark Roach, M.D. is a family medicine physician with a practice address in Visalia, California, and NPI 1538125497, issued on Apr 20, 2006. Check the license (California A50330, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William John Mark Roach
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A50330 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1860 S Central St, Visalia, CA 93277
- Phone
- (559) 738-8584
- Enumerated
- Apr 20, 2006
- Record last updated
- Oct 1, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (559) 733-4355
- Medicare enrollment
- Enrolled (PECOS I20081025000178); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1860 S Central St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Foxe, MDFamily Medicine Physician1396768842
Verify William John Mark Roach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A50330Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% more Medicare Part D claims than the average family medicine physician in 2024
6,815 Medicare Part D claims for 369 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 373 claims were for opioids.
Most prescribed
- Atorvastatin Calcium301 claims
- Hydrocodone-Acetaminophen185 claims
- Metformin Hcl185 claims
- Amlodipine Besylate164 claims
- Gabapentin162 claims
- Lisinopril159 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): 89 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).
Industry payments in 2024: $68.59
1 payment: food and beverage; the largest payer was Stemline Therapeutics Inc. The 55,478 providers of this specialty with any payment received $902.55 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.
Bills Medicare through 2 group practices
- Kaweah Delta Health Care DistrictVisalia, CA
- Sierra Family Practice Partners PCThree Rivers, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William John Mark Roach among 17,133 family medicine physician records in California
William John Mark Roach, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1984 · median 2005 among the 10,652 with a school on file
- Record last updated2008 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
74 family medicine physician records list a practice address in Visalia
They are 74 of the 4,225 NPPES records with a practice address in Visalia, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Visalia → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Thomas Daglish, M.D.Visalia, CA 932771982688206
- James Foxe, MDVisalia, CA 932771396768842
- William Holvik, M.D.Visalia, CA 932771346225364
- Boyd Johnson, D.O.Visalia, CA 932771215015482
- Ihor Kalicinsky, MDVisalia, CA 932771285608521
- Kamel Kamel, M.D.Visalia, CA 932771316379712
- Patricia King, C-PAVisalia, CA 932771962575142
- H. Princeton, M.D.Visalia, CA 932771033117775
Common questions
What is William John Mark Roach, M.D.'s NPI number?
William John Mark Roach, M.D.'s National Provider Identifier (NPI) is 1538125497, issued on Apr 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William John Mark Roach, M.D. located?
The NPPES record lists a practice address at 1860 S Central St, Visalia, CA, 93277. Phone: (559) 738-8584. Providers update this record themselves, so call before visiting.
How can I verify William John Mark Roach, M.D.'s license?
NPPES lists California license number A50330, 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 William John Mark Roach, M.D. prescribe under Medicare Part D?
In 2024, William John Mark Roach, M.D. had 6,815 Medicare Part D claims for 369 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is William John Mark Roach, M.D.'s MIPS final score?
The 2023 MIPS final score is 89 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.