John Mongan, D.O.
NPI 1134235765 · Hematology & Oncology Physician · Malta, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mongan, D.O. is a Hematology & Oncology Physician provider in Malta, NY (NPI 1134235765).
Provider details
- NPI number
- 1134235765
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 248746 (NY)
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
19 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
675 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 | 478 | $92 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 140 | $136 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 27 | $171 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 16 | $79 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 14 | $64 |
Typical Medicare-allowed amounts for these services range $64–$171 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 175 | 51 |
| Famotidine | 142 | 53 |
| Prednisone | 82 | 32 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 78 | 28 |
| Prochlorperazine Maleate | 74 | 56 |
| Hydroxyurea | 67 | 14 |
| Abiraterone Acetate | 65 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$405 across 13 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
- 2006-08-23
- Last updated
- 2015-11-06
Frequently asked questions
- What is John Mongan's NPI number?
- John Mongan's National Provider Identifier (NPI) is 1134235765, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mongan's specialty?
- John Mongan is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Mongan located?
- John Mongan's practice location on file with NPPES is 6 Medical Park Dr, Malta, NY 12020-5051.
- What is John Mongan's phone number?
- The practice phone number listed in the NPPES registry for John Mongan is (518) 289-2717.
- Does John Mongan accept Medicare?
- John Mongan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mongan's NPI active?
- Yes — John Mongan's NPI (1134235765) is active in the NPPES registry as of the last update on 2015-11-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.