William M. Tang, M.D.
Ophthalmology Physician · Natick, MA
William M. Tang, M.D. is an ophthalmology physician with a practice address in Natick, Massachusetts, and NPI 1972540177, issued on May 31, 2006. Check the license (Massachusetts 153637, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William M. Tang
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 153637 MA
Self-reported in NPPES; status is on the state search - Practice location
- 182 W Central St Ste 102, Natick, MA 01760
- Phone
- (508) 903-0003
- Enumerated
- May 31, 2006
- Record last updated
- Nov 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20111020000119); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 791 in Massachusetts → Look up another NPI →
Verify William M. Tang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 153637Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,194 Medicare Part D claims for 247 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Latanoprost313 claims
- Brimonidine Tartrate135 claims
- Timolol Maleate128 claims
- Prednisolone Acetate107 claims
- Dorzolamide-Timolol73 claims
- Bromfenac Sodium71 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): 100 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: $46.59
2 payments; by number, the most common kind was food and beverage; the largest payer was Eagle Pharmaceuticals, 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.
William M. Tang among 791 ophthalmology physician records in Massachusetts
William M. Tang, M.D. is one of 791 ophthalmology physician records with a practice address in Massachusetts. 76% 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 23% of them.
- NPI issued2006 · 23% of these records are older, 48% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1993 · median 2002 among the 518 with a school on file
- Record last updated2021 · 65% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Massachusetts
There are 791 ophthalmology physician records in Massachusetts.
All 791 in Massachusetts → Every provider in Natick → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Stephen Belmonte, M.D.Natick, MA 017601942249834
- Bruce Gillers, M.D.Natick, MA 017601811956907
- John Hatch, MDMilford, MA 017571306844402
- Roger KaldawyMilford, MA 017571750389854
- Francis Sutula, MDMilford, MA 017571518933142
- Diane Karalekas, M.D.Marlborough, MA 017521992742944
- Susan Yeomans, M.D.Marlborough, MA 017521710912043
- Ippolit Matjucha, MDSudbury, MA 017761811098023
Common questions
What is William M. Tang, M.D.'s NPI number?
William M. Tang, M.D.'s National Provider Identifier (NPI) is 1972540177, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William M. Tang, M.D. located?
The NPPES record lists a practice address at 182 W Central St Ste 102, Natick, MA, 01760. Phone: (508) 903-0003. Providers update this record themselves, so call before visiting.
How can I verify William M. Tang, M.D.'s license?
NPPES lists Massachusetts license number 153637, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William M. Tang, M.D. prescribe under Medicare Part D?
In 2024, William M. Tang, M.D. had 1,194 Medicare Part D claims for 247 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is William M. Tang, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 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.