Ann Katherine Williams Md, M.D.
Ophthalmology Physician · Hammond, IN
Ann Katherine Williams Md, M.D. is an ophthalmology physician with a practice address in Hammond, Indiana, and NPI 1043216732, issued on Jun 27, 2005. Check the license (Indiana 01039204A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Ann Katherine Williams Md
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- 01039204A IN
036068962 IL
Self-reported in NPPES; status is on the state search - Practice location
- 6850 Hohman Ave, Hammond, IN 46324
- Phone
- (219) 931-7509
- Enumerated
- Jun 27, 2005
- Record last updated
- Mar 6, 2025
- Medicaid ID
- 100465760 IN
- Medicare enrollment
- Enrolled (PECOS I20100712000401); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1983
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 311 in Indiana → Look up another NPI →
Also registered at 6850 Hohman Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elaine Kelly, MDOphthalmology Physician1982264206
- Megan Silas, MDOphthalmology Physician1821450578
- Blake Williams, M.D.Ophthalmology Physician1497101018
Verify Ann Katherine Williams Md in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01039204ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,482 Medicare Part D claims for 417 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 38% of claims.
Most prescribed
- Latanoprost592 claims
- Dorzolamide-Timolol217 claims
- Timolol Maleate102 claims
- Prednisolone Acetate85 claims
- Brimonidine Tartrate82 claims
- Lumigan52 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): 97 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: $1,028.68
22 payments; by number, the most common kind was food and beverage; the largest payer was Harrow Eye, LLC. 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.
Bills Medicare through one group practice
- Williams Eye Institute PCHammond, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ann Katherine Williams Md among 311 ophthalmology physician records in Indiana
Ann Katherine Williams Md, M.D. is one of 311 ophthalmology physician records with a practice address in Indiana. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 70% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1983 · median 2000 among the 197 with a school on file
- Record last updated2025 · 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 207W00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Indiana
There are 311 ophthalmology physician records in Indiana.
All 311 in Indiana → Every provider in Hammond → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Elaine Kelly, MDHammond, IN 463241982264206
- Megan Silas, MDHammond, IN 463241821450578
- Blake Williams, M.D.Hammond, IN 463241497101018
- Ruchita Amin, M.D.Munster, IN 463211235367467
- Jason Brooks, M.D.Munster, IN 463211427215128
- Derek Dawson, M.D.Munster, IN 463211013992411
- Rand Diab, M.D.Munster, IN 463211437105996
- Suzanne Lee, M.D.Munster, IN 463211891884078
Common questions
What is Ann Katherine Williams Md, M.D.'s NPI number?
Ann Katherine Williams Md, M.D.'s National Provider Identifier (NPI) is 1043216732, issued on Jun 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ann Katherine Williams Md, M.D. located?
The NPPES record lists a practice address at 6850 Hohman Ave, Hammond, IN, 46324. Phone: (219) 931-7509. Providers update this record themselves, so call before visiting.
How can I verify Ann Katherine Williams Md, M.D.'s license?
NPPES lists Indiana license number 01039204A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ann Katherine Williams Md, M.D. prescribe under Medicare Part D?
In 2024, Ann Katherine Williams Md, M.D. had 1,482 Medicare Part D claims for 417 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Ann Katherine Williams Md, M.D.'s MIPS final score?
The 2023 MIPS final score is 97 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.