Joann Zell, M.D.
NPI 1760415418 · Rheumatology Physician · Denver, CO
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joann Zell, M.D. is a Rheumatology Physician provider in Denver, CO (NPI 1760415418).
Provider details
- NPI number
- 1760415418
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 45196 (CO)
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
198 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 | 107 | $95 |
| 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 | 50 | $16 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 30 | $139 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 11 | $179 |
Typical Medicare-allowed amounts for these services range $16–$179 (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 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 97 | 31 |
| Belimumabbrand: Benlysta | 47 | — |
| Methotrexate Sodiumbrand: Methotrexate | 37 | 11 |
| Pregabalin | 32 | — |
| Mycophenolate Mofetil | 24 | — |
| Azathioprine | 21 | — |
| Prednisone | 18 | 12 |
Practice location
Mailing address
Additional practice locations (2)
- 12605 E 16th AveAurora, CO 80045-2545Phone: (720) 848-0000
- 777 Bannock StDenver, CO 80204-4507Phone: (303) 436-6000
Registry dates
- Enumerated
- 2006-07-08
- Last updated
- 2022-07-21
Frequently asked questions
- What is Joann Zell's NPI number?
- Joann Zell's National Provider Identifier (NPI) is 1760415418, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joann Zell's specialty?
- Joann Zell is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Joann Zell located?
- Joann Zell's practice location on file with NPPES is 1400 Jackson St, Denver, CO 80206-2761.
- What is Joann Zell's phone number?
- The practice phone number listed in the NPPES registry for Joann Zell is (303) 388-4461.
- Does Joann Zell accept Medicare?
- Joann Zell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joann Zell's NPI active?
- Yes — Joann Zell's NPI (1760415418) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.