Jessica Diethelm, M.D.
NPI 1427232412 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jessica Diethelm, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1427232412).
Provider details
- NPI number
- 1427232412
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036118681 (IL)
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
18 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
1,363 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 | 476 | $132 |
| 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 | 259 | $17 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 133 | $133 |
| Administration of Influenza Virus VaccineG0008 | 89 | $34 |
| Hemoglobin A1c Level83036 | 81 | $10 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 86 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 645 | 222 |
| Amlodipine Besylate | 321 | 101 |
| Hydrochlorothiazide | 277 | 83 |
| Lisinopril | 187 | 58 |
| Omeprazole | 174 | 55 |
| Levothyroxine Sodium | 158 | 45 |
| Gabapentin | 147 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-12-26
- Last updated
- 2011-05-04
Frequently asked questions
- What is Jessica Diethelm's NPI number?
- Jessica Diethelm's National Provider Identifier (NPI) is 1427232412, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jessica Diethelm's specialty?
- Jessica Diethelm is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jessica Diethelm located?
- Jessica Diethelm's practice location on file with NPPES is 1725 W Harrison St, Chicago, IL 60612-3841.
- What is Jessica Diethelm's phone number?
- The practice phone number listed in the NPPES registry for Jessica Diethelm is (312) 942-6700.
- Does Jessica Diethelm accept Medicare?
- Jessica Diethelm is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jessica Diethelm's NPI active?
- Yes — Jessica Diethelm's NPI (1427232412) is active in the NPPES registry as of the last update on 2011-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.