William Imlach, D.O.
NPI 1699850610 · Family Medicine Physician · Olympia Fields, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Imlach, D.O. is a Family Medicine Physician provider in Olympia Fields, IL (NPI 1699850610).
Provider details
- NPI number
- 1699850610
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 036091396 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,239 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 708 | $130 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 499 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 255 | $130 |
| Hemoglobin A1c Level83036 | 248 | $9 |
| Administration of Influenza Virus VaccineG0008 | 122 | $34 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 118 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 259 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,216 | 353 |
| Amlodipine Besylate | 825 | 252 |
| Metoprolol Succinate | 613 | 175 |
| Levothyroxine Sodium | 561 | 144 |
| Pantoprazole Sodium | 505 | 168 |
| Gabapentin | 503 | 124 |
| Rosuvastatin Calcium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$975 across 59 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
Registry dates
- Enumerated
- 2006-10-26
- Last updated
- 2025-03-05
- Certified
- 2025-03-05
Frequently asked questions
- What is William Imlach's NPI number?
- William Imlach's National Provider Identifier (NPI) is 1699850610, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Imlach's specialty?
- William Imlach is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Imlach located?
- William Imlach's practice location on file with NPPES is 4001 Vollmer Rd., Olympia Fields, IL 60461-1073.
- What is William Imlach's phone number?
- The practice phone number listed in the NPPES registry for William Imlach is (708) 481-8883.
- Does William Imlach accept Medicare?
- William Imlach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Imlach's NPI active?
- Yes — William Imlach's NPI (1699850610) is active in the NPPES registry as of the last update on 2025-03-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.