Jacob Zembles, MD
NPI 1285164228 · Rheumatology Physician · Ballwin, MO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jacob Zembles, MD is a Rheumatology Physician provider in Ballwin, MO (NPI 1285164228).
Provider details
- NPI number
- 1285164228
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2020025235 (MO)
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
98 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 31 | $127 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 27 | $70 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 20 | $107 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 20 | $53 |
Typical Medicare-allowed amounts for these services range $53–$127 (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 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 186 | 68 |
| Prednisone | 145 | 48 |
| Methotrexate Sodiumbrand: Methotrexate | 89 | 28 |
| Sulfasalazine | 39 | — |
| Allopurinol | 38 | — |
| Adalimumabbrand: Humira(cf) Pen | 29 | — |
| Mycophenolate Mofetil | 24 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-06-13
- Last updated
- 2024-11-11
- Certified
- 2023-08-28
Frequently asked questions
- What is Jacob Zembles's NPI number?
- Jacob Zembles's National Provider Identifier (NPI) is 1285164228, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jacob Zembles's specialty?
- Jacob Zembles is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Jacob Zembles located?
- Jacob Zembles's practice location on file with NPPES is 15945 Clayton Rd, Ballwin, MO 63011-2490.
- What is Jacob Zembles's phone number?
- The practice phone number listed in the NPPES registry for Jacob Zembles is (636) 256-5070.
- Does Jacob Zembles accept Medicare?
- Jacob Zembles is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jacob Zembles's NPI active?
- Yes — Jacob Zembles's NPI (1285164228) is active in the NPPES registry as of the last update on 2024-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.