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Internal Medicine Providers in Norman, OK

Browse 28 Internal Medicine providers listed in NPPES with a practice address in Norman, Oklahoma.

28 Healthcare Providers

How Norman compares with the U.S.

Norman has 22 clinicians in Internal Medicine per 100,000 residents, about 49% of the U.S. rate of 44.

That is 28 active clinicians in Internal Medicine with a practice address in Norman, for a population of 129,672.

The Oklahoma rate is 28 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places.

95% of clinicians in Internal Medicine in Norman listed in the CMS Medicare file (21 of 22) accept Medicare assignment. That is similar to the Oklahoma share of 98%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

55% of clinicians in Internal Medicine in Norman listed in the CMS Medicare file (12 of 22) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Oklahoma share of 27%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine practitioners in Norman, OK

Source: CMS PECOS
PECOS Enrolled Specialists 25 In Norman, OK
Part B Lab & Imaging Eligible 25 Diagnostic Referrals
DME Ordering Eligible 25 Durable Medical Equipment
Home Health Agency Referrals 25 HHA Ordering Eligible
Showing 1โ€“20 of 28 providers
With recent CMS data first, then Aโ€“Z

Dr. Lydia Rene Ballard , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
950 N Porter Ave, Suite #300, Norman, OK 730716400
Phone: 4053290121
NPI Identifier 1760483457
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Dr. Sarah Elizabeth Brown , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
901 N Porter Ave, Norman, OK 730716404
Phone: 4053071500
NPI Identifier 1376172064
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Dr. Jonathan A Bryan , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
950 N Porter Ave, Suite 300, Norman, OK 730716400
Phone: 4053290121
NPI Identifier 1437363702
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Dr. Geo Philips Chacko , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
901 N Porter Ave, Norman, OK 730716404
Phone: 4053076630
NPI Identifier 1700842440
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Dr. Mehmood Cheema , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
901 N Porter Ave, Norman, OK 730716404
Phone: 4053071500
NPI Identifier 1245867779
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Dr. Steffie-Ann Orlene Dujon , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
500 E Robinson St Ste 2600, Norman, OK 730716678
Phone: 4055150380
NPI Identifier 1922637131
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Dr. Kumar B Ennamuri , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1125 N Porter Ave Ste 300, Norman, OK 730716443
Phone: 4053640630
NPI Identifier 1396783056
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Dr. Justin Elliot Fields , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
950 N Porter, Suite 300, Norman, OK 730716400
Phone: 4053290121
NPI Identifier 1003013723
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Dr. Johnny O Johnson , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
15951 Little Axe Dr, Norman, OK 730269088
Phone: 4054470300
NPI Identifier 1538234554
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Dr. Awaad Khan , MD

Internal Medicine

Active NPI Status
901 N Porter Ave, Norman, OK 730716404
Phone: 4053071000
NPI Identifier 1477181121
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Dr. John M. Krodel , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
950 N Porter Ave, Suite 300, Norman, OK 730716400
Phone: 4053290121
NPI Identifier 1225020035
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Dr. Sanober Malik , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3400 W Tecumseh Rd, Suite 202, Norman, OK 730721810
Phone: 4053075770
NPI Identifier 1891835708
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Dr. John W Mccarter , MD

Internal Medicine

Active NPI Status
500 E Robinson St Ste 2400, Norman, OK 730716684
Phone: 4053076668
NPI Identifier 1568445625
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Dr. Thomas Merrill , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
950 N Porter Ave, Suite 300, Norman, OK 730716400
Phone: 4053210121
NPI Identifier 1760474605
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Dr. Serena Mitroo , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
950 N Porter Ave Ste 200, Norman, OK 730716400
Phone: 4053290121
NPI Identifier 1780880252
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Dr. Ashley Nicole Muckala , DO

Internal Medicine

Active NPI Status
700 24th Ave Nw, Norman, OK 730696232
Phone: 4053640555
NPI Identifier 1497949051
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Dr. Mudassir Nawaz , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
500 E Robinson St Ste 800, Norman, OK 730716681
Phone: 4053211004
NPI Identifier 1396737789
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Dr. Christopher Parker , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
701 E Robinson St Ste 105, Norman, OK 730716625
Phone: 4055154888
NPI Identifier 1518251735
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Dr. Paul L. Plusquellec , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
950 N Porter Ave, Suite 300, Norman, OK 73071
Phone: 4053290121
NPI Identifier 1295727089
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Dr. Gary D Ratliff , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
500 E Robinson St Ste 2600, Norman, OK 730716678
Phone: 4053076668
NPI Identifier 1902888274
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Frequently Asked Questions about Internal Medicine in Norman

How do I check a Internal Medicine practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Oklahoma licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.