Karlen Ulubabyan, MD
NPI 1376121947 · Hospitalist Physician · New York, NY
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karlen Ulubabyan, MD is a Hospitalist Physician provider in New York, NY (NPI 1376121947).
Provider details
- NPI number
- 1376121947
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 327966 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
5 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
118 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 103 | $86 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 15 | $125 |
Typical Medicare-allowed amounts for these services range $86–$125 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Amlodipine Besylate | 24 |
| Gabapentin | 19 |
| Hydrochlorothiazide | 16 |
| Metoprolol Tartrate | 16 |
| Lisinopril | 15 |
| Rosuvastatin Calcium | 14 |
| Levothyroxine Sodium | 13 |
| Atorvastatin Calcium | 12 |
| Allopurinol | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-04-01
- Last updated
- 2026-02-13
- Certified
- 2026-02-13
Frequently asked questions
- What is Karlen Ulubabyan's NPI number?
- Karlen Ulubabyan's National Provider Identifier (NPI) is 1376121947, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karlen Ulubabyan's specialty?
- Karlen Ulubabyan is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Karlen Ulubabyan located?
- Karlen Ulubabyan's practice location on file with NPPES is 525 E 68th St # Street5, New York, NY 10065-4870.
- What is Karlen Ulubabyan's phone number?
- The practice phone number listed in the NPPES registry for Karlen Ulubabyan is (211) 276-4071.
- Does Karlen Ulubabyan accept Medicare?
- Karlen Ulubabyan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karlen Ulubabyan's NPI active?
- Yes — Karlen Ulubabyan's NPI (1376121947) is active in the NPPES registry as of the last update on 2026-02-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.