Mary Karen Pena, M.D.
NPI 1386746634 · Neurology Physician · Humacao, PR
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Karen Pena, M.D. is a Neurology Physician provider in Humacao, PR (NPI 1386746634).
Provider details
- NPI number
- 1386746634
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 12866 (PR)
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
18 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 | 18 | $126 |
Typical Medicare-allowed amounts for these services range $126–$126 (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 · 77 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Donepezil Hcl | 2,044 | 412 |
| Memantine Hcl | 1,180 | 231 |
| Gabapentin | 945 | 180 |
| Tizanidine Hcl | 916 | 192 |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa | 496 | 86 |
| Levetiracetam | 414 | 77 |
| Topiramate | 357 | 67 |
| Pramipexole Di-Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$131 across 6 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
- 2006-09-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary Karen Pena's NPI number?
- Mary Karen Pena's National Provider Identifier (NPI) is 1386746634, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Karen Pena's specialty?
- Mary Karen Pena is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Karen Pena located?
- Mary Karen Pena's practice location on file with NPPES is 334 Ave Font Martelo, Humacao, PR 00791.
- What is Mary Karen Pena's phone number?
- The practice phone number listed in the NPPES registry for Mary Karen Pena is (787) 852-0886.
- Does Mary Karen Pena accept Medicare?
- Mary Karen Pena is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Karen Pena's NPI active?
- Yes — Mary Karen Pena's NPI (1386746634) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.