Physician Profile
Mark Steven Reiter, M.D.
Unclaimed ProfileAbout Dr. Reiter
Mark Steven Reiter, M.D. practices internal medicine in Oak Lawn, IL. Mark is also listed as specializing in geriatric medicine. According to Medicare claims data, Mark cared for 105 Medicare patients across 164 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (708) 499-2323
- Email not available
Practice Locations
4400 W 95TH ST
Oak Lawn, IL 60453
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Procedures & services
Most searched procedures
Procedures Most Often Billed to Medicare
164 services · 105 patients · 3 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
110 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
42 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
12 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internists at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 7 related providers in 1 group
Common questions
What is Dr. Reiter's specialty?
Dr. Reiter is an internist in Oak Lawn, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Internal Medicine”.
NPI registry
Where can I find Dr. Reiter?
Dr. Reiter is listed at 4400 W 95TH ST, Oak Lawn, IL 60453. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Reiter?
The number on file is (708) 499-2323. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Reiter's NPI number?
Dr. Reiter's National Provider Identifier is 1902864408. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Dr. Reiter been practicing?
Dr. Reiter has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What is Dr. Reiter known for?
According to Medicare billing data, Dr. Reiter the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Reiter confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Reiter. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.