Dionna Lomax, M.D.
NPI 1639336399 · Family Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dionna Lomax, M.D. is a Family Medicine Physician provider in Chicago, IL (NPI 1639336399).
Provider details
- NPI number
- 1639336399
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036.125407 (IL)
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
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
370 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 | 102 | $99 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 72 | $133 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 55 | $66 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 48 | $84 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 34 | $133 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 125 | 67 |
| Amlodipine Besylate | 72 | 45 |
| Hydrochlorothiazide | 48 | 24 |
| Levothyroxine Sodium | 46 | 28 |
| Losartan Potassium | 41 | 23 |
| Sertraline Hcl | 39 | 15 |
| Gabapentin |
Practice location
Mailing address
Additional practice locations (1)
- 15300 West AveOrland Park, IL 60462-4600Phone: (708) 226-2440Fax: (708) 226-2441
Registry dates
- Enumerated
- 2008-05-20
- Last updated
- 2021-03-20
- Certified
- 2021-03-20
Frequently asked questions
- What is Dionna Lomax's NPI number?
- Dionna Lomax's National Provider Identifier (NPI) is 1639336399, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dionna Lomax's specialty?
- Dionna Lomax is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Dionna Lomax located?
- Dionna Lomax's practice location on file with NPPES is 10834 S Doty Ave, Chicago, IL 60628-3802.
- What is Dionna Lomax's phone number?
- The practice phone number listed in the NPPES registry for Dionna Lomax is (312) 268-6630.
- Does Dionna Lomax accept Medicare?
- Dionna Lomax is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dionna Lomax's NPI active?
- Yes — Dionna Lomax's NPI (1639336399) is active in the NPPES registry as of the last update on 2021-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.