Patricia Merlo, D.O.
NPI 1972501161 · Internal Medicine Physician · Elgin, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Patricia Merlo, D.O. is a Internal Medicine Physician provider in Elgin, IL (NPI 1972501161).
Provider details
- NPI number
- 1972501161
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 036089508 (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
20 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
2,037 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 | 705 | $129 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 630 | $8 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 319 | $130 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 141 | $91 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 71 | $14 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 94 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 620 | 169 |
| Levothyroxine Sodium | 437 | 116 |
| Amlodipine Besylate | 369 | 98 |
| Lisinopril | 308 | 87 |
| Metoprolol Succinate | 282 | 74 |
| Losartan Potassium | 261 | 69 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-12
- Last updated
- 2022-04-19
- Certified
- 2022-04-19
Frequently asked questions
- What is Patricia Merlo's NPI number?
- Patricia Merlo's National Provider Identifier (NPI) is 1972501161, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Patricia Merlo's specialty?
- Patricia Merlo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Patricia Merlo located?
- Patricia Merlo's practice location on file with NPPES is 1710 N Randall Rd, Elgin, IL 60123-4717.
- What is Patricia Merlo's phone number?
- The practice phone number listed in the NPPES registry for Patricia Merlo is (847) 214-5755.
- Does Patricia Merlo accept Medicare?
- Patricia Merlo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Patricia Merlo's NPI active?
- Yes — Patricia Merlo's NPI (1972501161) is active in the NPPES registry as of the last update on 2022-04-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.