Gregory Dean Haselhuhn, M.D.
Specialist · Toledo, OH
Gregory Dean Haselhuhn, M.D. is a specialist with a practice address in Toledo, Ohio, and NPI 1538145560, issued on Dec 21, 2005. Check the license (Ohio 35068258, as entered in NPPES) with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory Dean Haselhuhn
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 35068258 OH
Self-reported in NPPES; status is on the state search - Practice location
- 2000 Regency CT, Toledo, OH 43623
- Phone
- (419) 725-1900
- Enumerated
- Dec 21, 2005
- Record last updated
- Jan 5, 2022
- Fax
- (419) 725-1905
- Medicaid ID
- 0186276 OH
- Medicare enrollment
- Enrolled (PECOS I20041124000055); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1989
- Entity
- Type 1 · individual
8 nearest specialist records → All 1,312 in Ohio → Look up another NPI →
Also registered at 2000 Regency CT
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gregory Dean Haselhuhn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license 35068258Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average specialist in 2024
4,619 Medicare Part D claims for 972 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Alfuzosin Hcl Er683 claims
- Tamsulosin Hcl555 claims
- Finasteride519 claims
- Solifenacin Succinate369 claims
- Nitrofurantoin Mono-Macro264 claims
- Cephalexin219 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.
Bills Medicare through one group practice
- Mercy Health Physicians North Specialty Care LLCToledo, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Dean Haselhuhn among 1,312 specialist records in Ohio
Gregory Dean Haselhuhn, M.D. is one of 1,312 specialist records with a practice address in Ohio. 15% 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, 90% newer
- In a Medicare fileYes · 15% of these records are
- In the CMS Doctors and Clinicians fileYes · 11% of these records are
- Graduated1989 · median 1988 among the 142 with a school on file
- Record last updated2022 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in Ohio
There are 1,312 specialist records in Ohio.
All 1,312 in Ohio → Every provider in Toledo → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- David Paradis, LPTToledo, OH 436231790853505
- Susan Pohlod, M.D.Toledo, OH 436231205800414
- Tonya Snyr, LMTToledo, OH 436231154608735
- Debra Unverferth, OTR/L CHTToledo, OH 436231497856116
- Sarah Hoge, PTToledo, OH 436171205989167
- Stacey Miles, OTR/LToledo, OH 436171225372824
- Claudio Linares, MDOregon, OH 436161831194646
- Charis Bryant BeyToledo, OH 436151033995303
Common questions
What is Gregory Dean Haselhuhn, M.D.'s NPI number?
Gregory Dean Haselhuhn, M.D.'s National Provider Identifier (NPI) is 1538145560, issued on Dec 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Dean Haselhuhn, M.D. located?
The NPPES record lists a practice address at 2000 Regency CT, Toledo, OH, 43623. Phone: (419) 725-1900. Providers update this record themselves, so call before visiting.
How can I verify Gregory Dean Haselhuhn, M.D.'s license?
NPPES lists Ohio license number 35068258, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
How much does Gregory Dean Haselhuhn, M.D. prescribe under Medicare Part D?
In 2024, Gregory Dean Haselhuhn, M.D. had 4,619 Medicare Part D claims for 972 beneficiaries; the average among specialist prescribers was 1,380. 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.