Joseph an, D.O.
NPI 1144512450 · Hematology & Oncology Physician · Portsmouth, VA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph an, D.O. is a Hematology & Oncology Physician provider in Portsmouth, VA (NPI 1144512450).
Provider details
- NPI number
- 1144512450
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
739 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 | 497 | $96 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 100 | $143 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 36 | $130 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 32 | $173 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 22 | $65 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
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 |
|---|---|---|
| Prednisone | 117 | 43 |
| Anastrozole | 107 | 29 |
| Gabapentin | 91 | 36 |
| Prochlorperazine Maleate | 62 | 39 |
| Lenalidomide | 59 | — |
| Ondansetronbrand: Ondansetron Odt | 57 | 39 |
| Letrozole | 57 | 16 |
| Tamoxifen Citrate |
Practice location
Mailing address
Additional practice locations (1)
- 4494 North Palmer RoadBethesda, MD 20889-0140Phone: (818) 355-9798
Registry dates
- Enumerated
- 2011-05-04
- Last updated
- 2022-06-13
- Certified
- 2022-06-13
Frequently asked questions
- What is Joseph an's NPI number?
- Joseph an's National Provider Identifier (NPI) is 1144512450, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph an's specialty?
- Joseph an is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph an located?
- Joseph an's practice location on file with NPPES is 620 John Paul Jones Cir, Portsmouth, VA 23708-2111.
- What is Joseph an's phone number?
- The practice phone number listed in the NPPES registry for Joseph an is (757) 953-1043.
- Does Joseph an accept Medicare?
- Joseph an is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph an's NPI active?
- Yes — Joseph an's NPI (1144512450) is active in the NPPES registry as of the last update on 2022-06-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.