Ann Mercer, M.D.
NPI 1811913502 · Internal Medicine Physician · Las Cruces, NM
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ann Mercer, M.D. is a Internal Medicine Physician provider in Las Cruces, NM (NPI 1811913502).
Provider details
- NPI number
- 1811913502
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 84-79 (NM)
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
2,513 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 | 494 | $125 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 448 | $116 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 311 | $88 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 256 | $8 |
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 164 | $75 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 107 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 301 | 86 |
| Levothyroxine Sodium | 289 | 71 |
| Lisinopril | 188 | 53 |
| Amlodipine Besylate | 184 | 50 |
| Gabapentin | 153 | 40 |
| Furosemide | 147 | 32 |
| Potassium Chloride | 134 | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$911 across 39 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
- 2006-07-14
- Last updated
- 2022-03-15
- Certified
- 2022-03-01
Frequently asked questions
- What is Ann Mercer's NPI number?
- Ann Mercer's National Provider Identifier (NPI) is 1811913502, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ann Mercer's specialty?
- Ann Mercer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ann Mercer located?
- Ann Mercer's practice location on file with NPPES is 2801 Missouri Ave, Las Cruces, NM 88011-5075.
- What is Ann Mercer's phone number?
- The practice phone number listed in the NPPES registry for Ann Mercer is (575) 522-6900.
- Does Ann Mercer accept Medicare?
- Ann Mercer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ann Mercer's NPI active?
- Yes — Ann Mercer's NPI (1811913502) is active in the NPPES registry as of the last update on 2022-03-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.