Frederick O'Neal Gregg, D.O.
Orthopaedic Surgery Physician · Hattiesburg, MS
Frederick O'Neal Gregg, D.O. is an orthopaedic surgery physician with a practice address in Hattiesburg, Mississippi, and NPI 1952523607, issued on May 3, 2007. Check the license (Mississippi 20954, as entered in NPPES) on the Mississippi State Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Frederick O'Neal Gregg
- Credential
- D.O.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- 20954 MS
001226 GA
Self-reported in NPPES; status is on the state search - Practice location
- 3688 Veterans Memorial Dr, Hattiesburg, MS 39401
- Phone
- (601) 554-7400
- Enumerated
- May 3, 2007
- Record last updated
- Jul 27, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (601) 554-7488
- Medicare enrollment
- Enrolled (PECOS I20100802000495); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 197 in Mississippi → Look up another NPI →
Also registered at 3688 Veterans Memorial Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Antinnes, M.D.,Orthopaedic Surgery of the Spine Physician1215966130
- Rocco Barbieri, M.D.,Orthopaedic Hand Surgery Physician1942239090
- Ava Bell, MDSpecialist1467543611
- Marshall Bynum, PAMedical Physician Assistant1174980213
- Constantine Charoglu, M.D.,Orthopaedic Hand Surgery Physician1255360186
- Richard Conn, M.D.,Adult Reconstructive Orthopaedic Surgery Physician1902835044
Verify Frederick O'Neal Gregg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMississippi State Board of Medical Licensure
Search for license 20954Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.8 times the Medicare Part D claims of the average orthopaedic surgery physician in 2024
1,315 Medicare Part D claims for 433 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were under 1% of claims. 366 claims were for opioids.
Most prescribed
- Meloxicam565 claims
- Tramadol Hcl219 claims
- Oxycodone Hcl83 claims
- Celecoxib55 claims
- Diclofenac Sodium55 claims
- Gabapentin50 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Southern Bone And Joint Specialists, PAHattiesburg, MS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Frederick O'Neal Gregg among 197 orthopaedic surgery physician records in Mississippi
Frederick O'Neal Gregg, D.O. is one of 197 orthopaedic surgery physician records with a practice address in Mississippi. 80% 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 44% of them.
- NPI issued2007 · 44% of these records are older, 46% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2005 · median 2005 among the 131 with a school on file
- Record last updated2010 · 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 207X00000X and a Mississippi practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Mississippi
There are 197 orthopaedic surgery physician records in Mississippi.
All 197 in Mississippi → Every provider in Hattiesburg → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Justin Badon, MDHattiesburg, MS 394011831686328
- Mark Barron, M.D.Hattiesburg, MS 394011255576377
- David Bomboy, MDHattiesburg, MS 394011033123716
- Michael Cox, MDHattiesburg, MS 394011356514988
- Robert Dews, MDHattlesburg, MS 394011194926766
- Sergey Dzugan, M.D.Hattiesburg, MS 394011861683203
- George Robertson, MDHattiesburg, MS 394011801026141
- Thomas RoyalsHattiesburg, MS 394011184068413
Common questions
What is Frederick O'Neal Gregg, D.O.'s NPI number?
Frederick O'Neal Gregg, D.O.'s National Provider Identifier (NPI) is 1952523607, issued on May 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Frederick O'Neal Gregg, D.O. located?
The NPPES record lists a practice address at 3688 Veterans Memorial Dr, Hattiesburg, MS, 39401. Phone: (601) 554-7400. Providers update this record themselves, so call before visiting.
How can I verify Frederick O'Neal Gregg, D.O.'s license?
NPPES lists Mississippi license number 20954, as entered by the provider. Search the Mississippi State Board of Medical Licensure at https://www.msbml.ms.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Frederick O'Neal Gregg, D.O. prescribe under Medicare Part D?
In 2024, Frederick O'Neal Gregg, D.O. had 1,315 Medicare Part D claims for 433 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is Frederick O'Neal Gregg, D.O.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.