NPPES file of Aug 9, 2026

Michael Gabriel Hillegass, M.D.

Pain Medicine (Anesthesiology) Physician · Charleston, SC

Michael Gabriel Hillegass, M.D. is a pain medicine (anesthesiology) physician with a practice address in Charleston, South Carolina, and NPI 1124225552, issued on Jun 29, 2007. Check the license (South Carolina 29814, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1124225552
Name
Michael Gabriel Hillegass
Credential
M.D.
Primary taxonomy
Pain Medicine (Anesthesiology) Physician 207LP2900X
License number
29814 SC
Self-reported in NPPES; status is on the state search
Practice location
167 Ashley Ave, Charleston, SC 29425
Phone
(843) 792-2322
Enumerated
Jun 29, 2007
Record last updated
Aug 15, 2016 (not updated in 10 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20161011001383); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest pain medicine (anesthesiology) physician records → All 64 in South Carolina → Look up another NPI →

Also registered at 167 Ashley Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ghada Abdel Hafez, M.D.Ophthalmology Physician1699901660
  2. Mercy Bechtold, MDOphthalmology Physician1164967857
  3. Daniel Couper, MDAnesthesiology Physician1689306086
  4. Rebecca Desso, M.D.Anesthesiology Physician1104188002
  5. Matthew Elliott, M.D.Anesthesiology Physician1700020054
  6. Sinan Ersan, MDOphthalmology Physician1821920315

Verify Michael Gabriel Hillegass in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
    Search for license 29814    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the South Carolina license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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51% fewer Medicare Part D claims than the average pain medicine (anesthesiology) physician in 2024

856 Medicare Part D claims for 133 beneficiaries, against an average of 1,750 among the 2,982 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 458 claims were for opioids.

  1. Michael Hillegass856
  2. Specialty average1,750

Most prescribed

  1. Hydrocodone-Acetaminophen88 claims
  2. Oxycodone-Acetaminophen85 claims
  3. Gabapentin75 claims
  4. Oxycodone Hcl69 claims
  5. Tramadol Hcl56 claims
  6. Pregabalin43 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

  1. University Medical Associates OF The Medical University OF South CarolCharleston, SC

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Michael Gabriel Hillegass among 64 pain medicine (anesthesiology) physician records in South Carolina

Michael Gabriel Hillegass, M.D. is one of 64 pain medicine (anesthesiology) physician records with a practice address in South Carolina. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 59% of them.

  • NPI issued2007 · 59% of these records are older, 27% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 72% of these records are
  • Graduated2007 · median 2003 among the 46 with a school on file
  • Record last updated2016 · 36% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207LP2900X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pain Medicine (Anesthesiology) Physician providers in South Carolina

There are 64 pain medicine (anesthesiology) physician records in South Carolina.

All 64 in South Carolina → Every provider in Charleston → Pain Medicine (Anesthesiology) Physician nationwide →

The 8 pain medicine (anesthesiology) physician records with the nearest ZIP codes

  1. Martin Burke, M.D.Charleston, SC 294251053793588
  2. Andrew MendelsonCharleston, SC 294251518329416
  3. Meron Selassie, MDCharleston, SC 294251932490091
  4. Mario Serafini, D.O.Charleston, SC 294251225097397
  5. Russell Seymore, M.D.Charleston, SC 294251881788636
  6. Arthur Smith, MDCharleston, SC 294251770691719
  7. Justin Wikle, M.D.Charleston, SC 294251912292152
  8. Robert Sullivan, M.D.Charleston, SC 294141538368923

Common questions

What is Michael Gabriel Hillegass, M.D.'s NPI number?

Michael Gabriel Hillegass, M.D.'s National Provider Identifier (NPI) is 1124225552, issued on Jun 29, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Michael Gabriel Hillegass, M.D. located?

The NPPES record lists a practice address at 167 Ashley Ave, Charleston, SC, 29425. Phone: (843) 792-2322. Providers update this record themselves, so call before visiting.

How can I verify Michael Gabriel Hillegass, M.D.'s license?

NPPES lists South Carolina license number 29814, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Michael Gabriel Hillegass, M.D. prescribe under Medicare Part D?

In 2024, Michael Gabriel Hillegass, M.D. had 856 Medicare Part D claims for 133 beneficiaries; the average among pain medicine (anesthesiology) physician prescribers was 1,750. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.