Timothy Witham, M.D.
NPI 1841236825 · Neurological Surgery Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Witham, M.D. is a Neurological Surgery Physician provider in Chicago, IL (NPI 1841236825).
Provider details
- NPI number
- 1841236825
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D61713 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
585 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Fusion of Additional Segment of Spine22614 | 95 | $373 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 89 | $93 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 71 | $174 |
| Partial Removal of Spine Bone With Release of Spinal Cord And/Or Nerves, Each Additional Segment63048 | 51 | $214 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 50 | $134 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$44,486 across 55 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 600 N Wolfe StBaltimore, MD 21287-0005Phone: (410) 955-6406
Registry dates
- Enumerated
- 2006-06-20
- Last updated
- 2026-04-10
- Certified
- 2026-04-10
Frequently asked questions
- What is Timothy Witham's NPI number?
- Timothy Witham's National Provider Identifier (NPI) is 1841236825, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Witham's specialty?
- Timothy Witham is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Witham located?
- Timothy Witham's practice location on file with NPPES is 5841 S Maryland Ave, Chicago, IL 60637-1443.
- What is Timothy Witham's phone number?
- The practice phone number listed in the NPPES registry for Timothy Witham is (888) 824-0200.
- Does Timothy Witham accept Medicare?
- Timothy Witham is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Witham's NPI active?
- Yes — Timothy Witham's NPI (1841236825) is active in the NPPES registry as of the last update on 2026-04-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.