Johannes Martensson, M.D.
NPI 1417954298 · Gastroenterology Physician · Inverness, FL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Johannes Martensson, M.D. is a Gastroenterology Physician provider in Inverness, FL (NPI 1417954298).
Provider details
- NPI number
- 1417954298
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- ME71187 (FL)
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
376 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 308 | $125 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 49 | $88 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 19 | $164 |
Typical Medicare-allowed amounts for these services range $88–$164 (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 |
|---|---|---|
| Famotidine | 131 | 47 |
| Pantoprazole Sodium | 96 | 35 |
| Omeprazole | 72 | 28 |
| Linaclotidebrand: Linzess | 52 | — |
| Metoclopramide Hcl | 40 | 15 |
| Dicyclomine Hcl | 31 | 14 |
| Ondansetron Hcl | 24 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$72 across 4 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
- 2005-07-07
- Last updated
- 2007-09-05
Frequently asked questions
- What is Johannes Martensson's NPI number?
- Johannes Martensson's National Provider Identifier (NPI) is 1417954298, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Johannes Martensson's specialty?
- Johannes Martensson is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Johannes Martensson located?
- Johannes Martensson's practice location on file with NPPES is 3653 E Forest Dr, Inverness, FL 34453-0787.
- What is Johannes Martensson's phone number?
- The practice phone number listed in the NPPES registry for Johannes Martensson is (352) 344-8080.
- Does Johannes Martensson accept Medicare?
- Johannes Martensson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Johannes Martensson's NPI active?
- Yes — Johannes Martensson's NPI (1417954298) is active in the NPPES registry as of the last update on 2007-09-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.