John Mamana, M.D.
NPI 1487654554 · Internal Medicine Physician · Reston, VA
John Mamana, M.D. is a Internal Medicine Physician provider in Reston, VA (NPI 1487654554).
Provider details
- NPI number
- 1487654554
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101021602 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Alprazolam | 26 |
| Amlodipine Besylate | 23 |
| Atorvastatin Calcium | 14 |
| Hydrochlorothiazide | 12 |
| Losartan Potassium | 12 |
| Dexlansoprazolebrand: Dexlansoprazole Dr | 11 |
| Spironolactone | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$16 across 1 record (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
- 2005-07-29
- Last updated
- 2010-03-25
Frequently asked questions
- What is John Mamana's NPI number?
- John Mamana's National Provider Identifier (NPI) is 1487654554, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mamana's specialty?
- John Mamana is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Mamana located?
- John Mamana's practice location on file with NPPES is 12040 S Lakes Dr, Reston, VA 20191-1246.
- What is John Mamana's phone number?
- The practice phone number listed in the NPPES registry for John Mamana is (703) 230-6990.
- Is John Mamana's NPI active?
- Yes — John Mamana's NPI (1487654554) is active in the NPPES registry as of the last update on 2010-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.