Matthew Witthaus, M.D.
NPI 1689012833 · Family Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Witthaus, M.D. is a Family Medicine Physician provider in Chicago, IL (NPI 1689012833).
Provider details
- NPI number
- 1689012833
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036147354 (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
13 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
107 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 30 | $82 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 26 | $121 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 23 | $8 |
| 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 | 17 | $16 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 11 | $84 |
Typical Medicare-allowed amounts for these services range $8–$121 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 37 |
| Amlodipine Besylate | 25 |
| Duloxetine Hcl | 25 |
| Lisinopril | 23 |
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 21 |
| Empagliflozinbrand: Jardiance | 18 |
| Metformin Hcl | 15 |
| Pantoprazole Sodium | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-06-10
- Last updated
- 2018-11-07
Frequently asked questions
- What is Matthew Witthaus's NPI number?
- Matthew Witthaus's National Provider Identifier (NPI) is 1689012833, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Witthaus's specialty?
- Matthew Witthaus is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Witthaus located?
- Matthew Witthaus's practice location on file with NPPES is 722 W Maxwell St Ste 235, Chicago, IL 60607-5002.
- What is Matthew Witthaus's phone number?
- The practice phone number listed in the NPPES registry for Matthew Witthaus is (312) 996-2901.
- Does Matthew Witthaus accept Medicare?
- Matthew Witthaus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Witthaus's NPI active?
- Yes — Matthew Witthaus's NPI (1689012833) is active in the NPPES registry as of the last update on 2018-11-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.