Clarissa Lock-O'Hanlon, M.D.
NPI 1528591013 · Internal Medicine Physician · New York, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clarissa Lock-O'Hanlon, M.D. is a Internal Medicine Physician provider in New York, NY (NPI 1528591013).
Provider details
- NPI number
- 1528591013
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 306494 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 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
1,237 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 301 | $150 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 229 | $9 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 174 | $19 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 116 | $156 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 100 | $107 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 41 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 124 | 39 |
| Amlodipine Besylate | 79 | 24 |
| Hydrochlorothiazide | 72 | 20 |
| Zolpidem Tartrate | 70 | 15 |
| Rosuvastatin Calcium | 67 | 19 |
| Levothyroxine Sodium | 56 | 19 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-04-11
- Last updated
- 2023-08-04
- Certified
- 2023-08-04
Frequently asked questions
- What is Clarissa Lock-O'Hanlon's NPI number?
- Clarissa Lock-O'Hanlon's National Provider Identifier (NPI) is 1528591013, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clarissa Lock-O'Hanlon's specialty?
- Clarissa Lock-O'Hanlon is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Clarissa Lock-O'Hanlon located?
- Clarissa Lock-O'Hanlon's practice location on file with NPPES is 38 E 32nd St Fl 3, New York, NY 10016-5568.
- What is Clarissa Lock-O'Hanlon's phone number?
- The practice phone number listed in the NPPES registry for Clarissa Lock-O'Hanlon is (646) 962-3940.
- Does Clarissa Lock-O'Hanlon accept Medicare?
- Clarissa Lock-O'Hanlon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clarissa Lock-O'Hanlon's NPI active?
- Yes — Clarissa Lock-O'Hanlon's NPI (1528591013) is active in the NPPES registry as of the last update on 2023-08-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.