Jonathan Massey, MD
NPI 1699745133 · Internal Medicine Physician · Oxford, MS
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Massey, MD is a Internal Medicine Physician provider in Oxford, MS (NPI 1699745133).
Provider details
- NPI number
- 1699745133
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 13545 (MS)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
320 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 179 | $163 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 129 | $112 |
| Critical Care, First 30-74 Minutes99291 | 12 | $195 |
Typical Medicare-allowed amounts for these services range $112–$195 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levofloxacin | 22 | 22 |
| Tramadol Hcl | 19 | 19 |
| Ketorolac Tromethamine | 19 | 19 |
| Furosemide | 19 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 14 | 14 |
| Ondansetronbrand: Ondansetron Odt | 14 | 13 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$61 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-26
- Last updated
- 2026-01-07
- Certified
- 2026-01-07
Frequently asked questions
- What is Jonathan Massey's NPI number?
- Jonathan Massey's National Provider Identifier (NPI) is 1699745133, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Massey's specialty?
- Jonathan Massey is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Massey located?
- Jonathan Massey's practice location on file with NPPES is 1300 Access Rd, Oxford, MS 38655-5209.
- What is Jonathan Massey's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Massey is (662) 232-8005.
- Does Jonathan Massey accept Medicare?
- Jonathan Massey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Massey's NPI active?
- Yes — Jonathan Massey's NPI (1699745133) is active in the NPPES registry as of the last update on 2026-01-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.