Katherine Direnzo Blatt, MD
Obstetrics & Gynecology Physician · Ann Arbor, MI
Katherine Direnzo Blatt, MD is an obstetrics & gynecology physician with a practice address in Ann Arbor, Michigan, and NPI 1780926501, issued on Mar 19, 2013. Check the license (Michigan 4301112379, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Katherine Direnzo Blatt
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 4301112379 MI
125.062659 IL
MD471202 PA
Self-reported in NPPES; status is on the state search - Practice location
- 4900A Jackson Road, Ann Arbor, MI 48103
- Phone
- (734) 998-7380
- Enumerated
- Mar 19, 2013
- Record last updated
- Jun 8, 2026
- Medicare enrollment
- Enrolled (PECOS I20200914002401); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,776 in Michigan → Look up another NPI →
Also registered at 4900A Jackson Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sherry Lenz, NPNurse Practitioner1376857045
Verify Katherine Direnzo Blatt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301112379Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
256 Medicare Part D claims for 111 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Estradiol64 claims
- Clobetasol Propionate16 claims
- Premarin14 claims
- Yuvafem14 claims
- Estradiol (Twice Weekly)12 claims
- Fluconazole12 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): 81.2 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: $94.95
4 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Tower Health Medical GroupWest Reading, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Direnzo Blatt among 1,776 obstetrics & gynecology physician records in Michigan
Katherine Direnzo Blatt, MD is one of 1,776 obstetrics & gynecology physician records with a practice address in Michigan. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 63% of them.
- NPI issued2013 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2013 · median 2007 among the 1,003 with a school on file
- Record last updated2026 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
143 obstetrics & gynecology physician records list a practice address in Ann Arbor
They are 143 of the 15,616 NPPES records with a practice address in Ann Arbor, and 1,776 obstetrics & gynecology physician records in Michigan.
All 1,776 in Michigan → Every provider in Ann Arbor → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Christina Darin, MDAnn Arbor, MI 481031295317758
- Ashley Dowgiert, M.D.Ann Arbor, MI 481031033478953
- Mary Johnson, M.D.Ann Arbor, MI 481031679639058
- Catriona Macardle, MDAnn Arbor, MI 481031538401773
- Lisa Morris, M.D.Ann Arbor, MI 481031740293638
- Kim Palfey, M.D.Ann Arbor, MI 481031194764084
- Caren Stalburg, MDAnn Arbor, MI 481031063509859
- Joanne Vicari Block, M.D.Ann Arbor, MI 481031023057932
Common questions
What is Katherine Direnzo Blatt, MD's NPI number?
Katherine Direnzo Blatt, MD's National Provider Identifier (NPI) is 1780926501, issued on Mar 19, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Direnzo Blatt, MD located?
The NPPES record lists a practice address at 4900A Jackson Road, Ann Arbor, MI, 48103. Phone: (734) 998-7380. Providers update this record themselves, so call before visiting.
How can I verify Katherine Direnzo Blatt, MD's license?
NPPES lists Michigan license number 4301112379, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Direnzo Blatt, MD prescribe under Medicare Part D?
In 2024, Katherine Direnzo Blatt, MD had 256 Medicare Part D claims for 111 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Katherine Direnzo Blatt, MD's MIPS final score?
The 2023 MIPS final score is 81.2 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.