John Leander Po, MD, PHD
NPI 1366638561 · Internal Medicine Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Leander Po, MD, PHD is a Internal Medicine Physician provider in Tucson, AZ (NPI 1366638561).
Provider details
- NPI number
- 1366638561
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 218627 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
406 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 | 193 | $124 |
| 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 | 123 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 90 | $88 |
Typical Medicare-allowed amounts for these services range $16–$124 (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 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 294 | 86 |
| Levothyroxine Sodium | 223 | 64 |
| Amlodipine Besylate | 178 | 50 |
| Losartan Potassium | 176 | 54 |
| Lisinopril | 145 | 39 |
| Gabapentin | 105 | 31 |
| Metformin Hcl |
Practice location
Mailing address
Additional practice locations (1)
- 7040 E Golf Links RdTucson, AZ 85730-1000Phone: (520) 200-6709Fax: (520) 532-1602
Registry dates
- Enumerated
- 2007-09-20
- Last updated
- 2025-06-12
- Certified
- 2025-06-12
Frequently asked questions
- What is John Leander Po's NPI number?
- John Leander Po's National Provider Identifier (NPI) is 1366638561, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Leander Po's specialty?
- John Leander Po is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Leander Po located?
- John Leander Po's practice location on file with NPPES is 3902 E Grant Rd, Tucson, AZ 85712-2558.
- What is John Leander Po's phone number?
- The practice phone number listed in the NPPES registry for John Leander Po is (520) 468-4801.
- Does John Leander Po accept Medicare?
- John Leander Po is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Leander Po's NPI active?
- Yes — John Leander Po's NPI (1366638561) is active in the NPPES registry as of the last update on 2025-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.