Gregory Obst, MD
Emergency Medicine Physician · Wausau, WI
Gregory Obst, MD is an emergency medicine physician with a practice address in Wausau, Wisconsin, and NPI 1629139548, issued on Dec 13, 2006. Check the license (Wisconsin 35317, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Obst
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 35317 WI
Self-reported in NPPES; status is on the state search - Practice location
- 333 Pine Ridge Blvd, Wausau, WI 54401
- Phone
- (715) 847-2304
- Enumerated
- Dec 13, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 32176500 WI
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 333 Pine Ridge Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sydney AlexanderOccupational Therapist1124689104
- Alanna AmbrosiusPharmacist1558213330
- Katelin BagleyOncology Registered Nurse1194678284
- Victoria BallardGenetic Counselor (M.S.)1942872791
Verify Gregory Obst in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 35317Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average emergency medicine physician in 2024
196 Medicare Part D claims for 126 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen24 claims
- Ondansetron Odt23 claims
- Prednisone22 claims
- Cephalexin18 claims
- Tizanidine Hcl16 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): 83.7 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).
Gregory Obst among 1,464 emergency medicine physician records in Wisconsin
Gregory Obst, MD is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2007 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Wisconsin
There are 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in Wausau → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Belal Afridi, MDWausau, WI 544011548218308
- Paul Gill, MDWausau, WI 544011528422623
- Bartholomew Hobson, MDWausau, WI 544011225138985
- Scott Howells, MDWausau, WI 544011538220413
- Thomas Hupy, M.D.Wausau, WI 544011144255274
- Thomas Koepke, MDWausau, WI 544011912068982
- Mark Mirick, MDWausau, WI 544011528129426
- Thomas Nielsen, MDWausau, WI 544011982765806
Common questions
What is Gregory Obst, MD's NPI number?
Gregory Obst, MD's National Provider Identifier (NPI) is 1629139548, issued on Dec 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Obst, MD located?
The NPPES record lists a practice address at 333 Pine Ridge Blvd, Wausau, WI, 54401. Phone: (715) 847-2304. Providers update this record themselves, so call before visiting.
How can I verify Gregory Obst, MD's license?
NPPES lists Wisconsin license number 35317, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Obst, MD prescribe under Medicare Part D?
In 2024, Gregory Obst, MD had 196 Medicare Part D claims for 126 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Gregory Obst, MD's MIPS final score?
The 2023 MIPS final score is 83.7 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.