William Zimmer MD PC
NPI 1194919522 · Hematology & Oncology Physician · Springfield, IL
William Zimmer MD PC is a Hematology & Oncology Physician organization in Springfield, IL (NPI 1194919522).
Provider details
- NPI number
- 1194919522
- Entity type
- Organization
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- William Zimmer, Owner(217) 544-6464
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-29
- Last updated
- 2007-10-02
Frequently asked questions
- What is William Zimmer MD PC's NPI number?
- William Zimmer MD PC's National Provider Identifier (NPI) is 1194919522, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is William Zimmer MD PC?
- William Zimmer MD PC is classified in the NPPES registry as Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Zimmer MD PC located?
- William Zimmer MD PC's practice location on file with NPPES is 301 N 8th St, Springfield, IL 62701-1041.
- What is William Zimmer MD PC's phone number?
- The practice phone number listed in the NPPES registry for William Zimmer MD PC is (217) 535-3799.
- Who is the authorized official for William Zimmer MD PC?
- The authorized official listed on William Zimmer MD PC's NPPES record is William Zimmer, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is William Zimmer MD PC's NPI active?
- Yes — William Zimmer MD PC's NPI (1194919522) is active in the NPPES registry as of the last update on 2007-10-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.