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DR. DIONNA LOMAX M.D.
NPI 1639336399
Family Medicine in Chicago, IL

Active since May 20, 2008PECOS EnrolledAccepts Medicare Assignment
10834 S DOTY AVE, CHICAGO, IL 60628(312) 268-6630(312) 268-6628 Get Directions Write a Review

NPPES record last updated: March 20, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 20, 2021, Mar 17, 2018, Feb 13, 2018 and 1 more (4 updates tracked since 2016).

About Dr. Dionna Lomax M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DIONNA LOMAX M.D. (NPI 1639336399) is an individual family medicine provider in Chicago, Illinois, licensed in Illinois (036.125407) and active in the NPI registry since May 2008. She is enrolled in Medicare PECOS, is affiliated with Palos Community Hospital, and maintains a secondary practice location in Orland Park.

NPPES Registry Identity

NPI1639336399
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. DIONNA LOMAXCredential: M.D.
Location Address10834 S DOTY AVEChicago, IL 60628-3802
Mailing AddressPo Box 781076Detroit, MI 48278-1076 · (317) 528-4800
Phone(312) 268-6630
Fax(312) 268-6628
Sole ProprietorNo
Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 2007
Enumeration DateMay 20, 2008
Last NPPES UpdateMarch 20, 20214 updates tracked since enumeration
NPPES CertifiedMarch 20, 2021
✔ NPI 1639336399 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in IL · 036.125407
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
10834 S DOTY AVE, Chicago, IL 60628
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Secondary Practice Location 1

Location 115300 West AveOrland Park, IL 60462-4600 · Phone (708) 226-2440 · Fax (708) 226-2441

Other Identifiers 1

Medicaid036125407IL

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Dionna Lomax M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9638351869
PECOS Enrollment IDI20110309000981
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Dionna Lomax reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Advocate Health & Hospitals Corporation
7.5 mi
Medical Specialty
4440 W 95TH ST
Oak Lawn, IL 60453
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Advocate Health And Hospitals Corporation
  • 4,870 clinicians in this Medicare group
NPI 1912936014 (847) 390-5900
Loyola University Medical Center
17 mi
General Practice
2160 S 1ST AVE
Maywood, IL 60153
  • Reassigned Medicare billing, Illinois enrollment
  • 1,138 clinicians in this Medicare group
NPI 1336159961 (708) 216-3215

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
102 services71 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
72 services72 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
55 services43 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
48 services48 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
34 services34 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
28 services26 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Palos Community Hospital

Acute Care Hospitals · Palos Heights, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140062
Location12251 South 80th AvenuePalos Heights, IL 60463 · Cook County
Emergency services Birthing friendly

Silver Cross Hospital And Medical Centers

Acute Care Hospitals · New Lenox, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140213
Location1900 Silver Cross BlvdNew Lenox, IL 60451 · Will County
Emergency services Birthing friendly

Loyola University Medical Center

Acute Care Hospitals · Maywood, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140276
Location2160 S 1st AvenueMaywood, IL 60153 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60628 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
6 suppliers11 claims22 services$6.02 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

INSIGHT CHICAGO, INC.
Clinic/Center (Urgent Care)
10834 S DOTY AVE
CHICAGO, IL 60628
Cook County (312) 567-2000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Dionna Lomax's NPI number?

The NPI number for Dionna Lomax is 1639336399. It was assigned to this individual provider in the NPPES registry on May 20, 2008.

Where is Dionna Lomax located?

Dionna Lomax practices at 10834 S Doty Ave, Chicago, IL 60628. The listed phone number is (312) 268-6630.

What is Dionna Lomax's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Dionna Lomax enrolled in Medicare?

Yes. Dionna Lomax is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Dionna Lomax's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dionna Lomax reassigns Medicare benefits to 2 organizations: Advocate Health & Hospitals Corporation (Oak Lawn, IL) and Loyola University Medical Center (Maywood, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Dionna Lomax's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Dionna Lomax affiliated with any hospitals?

According to CMS data, Dionna Lomax is affiliated with Palos Community Hospital, Silver Cross Hospital And Medical Centers and Loyola University Medical Center.

When was this NPI record last updated?

The NPPES record for Dionna Lomax was last updated on March 20, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.