Doctor profile · Federal record

Dr. GREGORY HORN, M.D.

Obstetrics & Gynecology Physician (CMS: OBSTETRICS/GYNECOLOGY) · Obstetrics & Gynecology Physician · OCEAN SPRINGS, MS

  • NPI 1659371128
  • Accepts Medicare
  • 33 yrs in practice
  • Licensed in 2 states
  • Male
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
21 DOCTORS DR
OCEAN SPRINGS, MS 395645709
(228) 872-1505
fax (228) 872-8575

Credentials & registration

NPPES · NUCC
NPI registered
July 2005 — 21 yrs on file
Profile last updated
October 19, 2010
Year of graduation
1993 — 33 yrs since
Specialty taxonomy
207V00000X — NUCC code
State licenses (2)
Mississippi #15343 · Louisiana #021971
Medicaid
MS #00118187

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1659371128. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
91
Distinct HCPCS
3
Medicare allowed
$4,916
HCPCS Description Services Patients Avg allowed
99213 Established patient office or other outpatient visit, 20-29 minutes 35 25 $82
G0101 Cervical or vaginal cancer screening; pelvic and clinical breast examination 30 30 $35
Q0091 Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory 26 26 $38

In context: peer comparison

Among 2 peers in this city , average services per provider: 70. This provider delivers 1.3× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$218
Transactions
12
Manufacturers
8
Payer (manufacturer) Industry Txns Amount
Ethicon US, LLC 2 $52.07
ABBVIE INC. 3 $48.63
Sage Therapeutics, Inc. 1 $26.01
MAYNE PHARMA COMMERCIAL LLC 2 $20.80
VERTEX PHARMACEUTICALS INCORPORATED 1 $19.14
Davol Inc. 1 $18.43
PFIZER INC. 1 $18.42
Lilly USA, LLC 1 $14.54

By nature of payment

Food and Beverage
$218

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
582
Patients
109
Total drug cost
$31,217
Drug Type Claims Patients Total cost
Estradiol Generic 258 59 $4,759
Alprazolam Generic 56 0 $128
Medroxyprogesterone Acetate Generic 44 0 $566
Clotrimazole-Betamethasone (Clotrimazole/Betamethasone Dip) Brand 36 21 $913
Premarin (Estrogens, Conjugated) Brand 28 0 $10,878
Fluconazole Generic 27 18 $141
Myrbetriq (Mirabegron) Brand 20 0 $9,815
Valacyclovir (Valacyclovir Hcl) Brand 18 0 $612
Ciprofloxacin Hcl Generic 17 11 $101
Estradiol-Norethindrone Acetat (Estradiol/Norethindrone Acet) Brand 15 0 $1,859

Hospital affiliations

CMS Hospital Compare