Mark Giacomi, D.O
NPI 1639334667 · Family Medicine Physician · Plainfield, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Giacomi, D.O is a Family Medicine Physician provider in Plainfield, IL (NPI 1639334667).
Provider details
- NPI number
- 1639334667
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O
- Sex
- Male
- Sole proprietor
- No
- License
- 036126516 (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
17 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
180 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 83 | $128 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 49 | $133 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 33 | $89 |
| Administration of Influenza Virus VaccineG0008 | 15 | $33 |
Typical Medicare-allowed amounts for these services range $33–$133 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 41 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 125 | 40 |
| Amlodipine Besylate | 85 | 25 |
| Levothyroxine Sodium | 78 | 19 |
| Metformin Hcl | 58 | 15 |
| Pantoprazole Sodium | 57 | 17 |
| Losartan Potassium | 48 | 17 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-18
- Last updated
- 2021-03-16
- Certified
- 2021-03-16
Frequently asked questions
- What is Mark Giacomi's NPI number?
- Mark Giacomi's National Provider Identifier (NPI) is 1639334667, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Giacomi's specialty?
- Mark Giacomi is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Giacomi located?
- Mark Giacomi's practice location on file with NPPES is 23836 W 135th St, Plainfield, IL 60544-5620.
- What is Mark Giacomi's phone number?
- The practice phone number listed in the NPPES registry for Mark Giacomi is (815) 254-2403.
- Does Mark Giacomi accept Medicare?
- Mark Giacomi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Giacomi's NPI active?
- Yes — Mark Giacomi's NPI (1639334667) is active in the NPPES registry as of the last update on 2021-03-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.