Claudia Zacharek, MD
Nephrology Physician · Saginaw, MI
Claudia Zacharek, MD is a nephrology physician with a practice address in Saginaw, Michigan, and NPI 1275692642, issued on Dec 8, 2006. Check the license (Michigan 4301092586, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Claudia Zacharek
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 4301092586 MI
L7540 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4677 Towne Centre RD Ste 303, Saginaw, MI 48604
- Phone
- (989) 401-5354
- Enumerated
- Dec 8, 2006
- Record last updated
- Mar 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (989) 790-7941
- Medicaid ID
- 1275692642 MI
- Medicare enrollment
- Enrolled (PECOS I20080829000024); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 376 in Michigan → Look up another NPI →
Also registered at 4677 Towne Centre RD Ste 303
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Winifred Angir-SiscoNurse Practitioner1053870170
- Lindsey Lacey, RN MSN FNP-CFamily Nurse Practitioner1063178028
Verify Claudia Zacharek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301092586Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average nephrology physician in 2024
4,495 Medicare Part D claims for 693 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 37 claims were for opioids.
Most prescribed
- Spironolactone389 claims
- Amlodipine Besylate366 claims
- Doxazosin Mesylate361 claims
- Hydralazine Hcl301 claims
- Furosemide261 claims
- Calcitriol234 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.
Industry payments in 2024: $23,677.52
14 payments; by number, the most common kind was travel and lodging; the largest payer was Genzyme Corporation. The 8,230 providers of this specialty with any payment received $3,091.37 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
- Claudia Zacharek MD PLCSaginaw, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Claudia Zacharek among 376 nephrology physician records in Michigan
Claudia Zacharek, MD is one of 376 nephrology physician records with a practice address in Michigan. 82% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 48% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1999 · median 2001 among the 279 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Michigan
There are 376 nephrology physician records in Michigan.
All 376 in Michigan → Every provider in Saginaw → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Manohar Atri, MDSaginaw, MI 486041346242591
- Veni Peram, M.DSaginaw, MI 486021316178718
- Adeel Khan, M.D.Midland, MI 486401467481465
- Shreedhar Adhikari, MDWest Branch, MI 486611033560057
- Amanda Gomes, M.D.West Branch, MI 486611649431321
- Seshma Ramsawak, MDWest Branch, MI 486611487216693
- Mohamed Abdalla, M.D.Flint, MI 485321760797344
- Jagdish Mirchandani, M.D.Flint, MI 485321710940853
Common questions
What is Claudia Zacharek, MD's NPI number?
Claudia Zacharek, MD's National Provider Identifier (NPI) is 1275692642, issued on Dec 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Claudia Zacharek, MD located?
The NPPES record lists a practice address at 4677 Towne Centre RD Ste 303, Saginaw, MI, 48604. Phone: (989) 401-5354. Providers update this record themselves, so call before visiting.
How can I verify Claudia Zacharek, MD's license?
NPPES lists Michigan license number 4301092586, 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 Claudia Zacharek, MD prescribe under Medicare Part D?
In 2024, Claudia Zacharek, MD had 4,495 Medicare Part D claims for 693 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
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.