Quick answers
- Does John S. Hrom Iii accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Hrom Iii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does John S. Hrom Iii see?
- In 2024, CMS data shows 969 Original Medicare patients and 416,086 services for John S. Hrom Iii. This counts Original Medicare only and measures volume, not quality.
- What is John S. Hrom Iii's NPI number?
- 1134238496. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for John S. Hrom Iii, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 969 |
|---|---|
| Services billed to Medicare | 416,086 |
| Different services or procedures | 130 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Injection, ferric carboxymaltose, 1 mg (J1439)72,000 services
- Injection, nivolumab, 1 mg (J9299)39,460 services
- Injection, oxaliplatin, 0.5 mg (J9263)28,238 services
- Injection, azacitidine, 1 mg (J9025)28,000 services
- Injection, fosaprepitant, 1 mg (J1453)25,350 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol72%
- Arthritis53%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)51%
- Ischemic heart disease39%
- Diabetes33%
Hospitals where John S. Hrom Iii works
Medicare's Facility Affiliation Data lists John S. Hrom Iii at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Forrest General HospitalHattiesburg, MS · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 250078
- Highland Community HospitalPicayune, MS · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 250117
- Marion General HospitalColumbia, MS · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 250085
- Merit Health WesleyHattiesburg, MS · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 250094
- South Central Regional Medical CenterLaurel, MS · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 250058
Practice locations
Addresses where John S. Hrom Iii is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 20; the Medicare profile lists all.
- 101 Weems St, The Family Clinic of PurvisPurvis, MS 39475 (601) 794‑2224
- 102 Shelby Speights DrPurvis, MS 39475 (601) 794‑8065
- 1238 Hwy 42Sumrall, MS 39482 (601) 758‑3100
- 1240 Hwy 42Sumrall, MS 39482 (601) 264‑6000
- 1407 S Main St, The Poplarville ClinicPoplarville, MS 39470 (601) 264‑6000
Group practices
Medicare enrollment lists John S. Hrom Iii as a member of this group (CMS data updated October 2, 2026).
- Hattiesburg Clinic PA537 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Mississippi
Clinicians with the same Medicare primary specialty in Mississippi — not a recommendation.
Other clinicians in Hattiesburg Clinic PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Mississippi School Of Medicine |
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134238496 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians