Michael Groshner
NPI 1861929952 · Internal Medicine Physician · Las Vegas, NV
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Groshner is a Internal Medicine Physician provider in Las Vegas, NV (NPI 1861929952).
Provider details
- NPI number
- 1861929952
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- DO2637 (NV)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 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
180 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 81 | $112 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 50 | $75 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 36 | $107 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 13 | $166 |
Typical Medicare-allowed amounts for these services range $75–$166 (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 · 132 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 615 | 235 |
| Lisinopril | 321 | 114 |
| Levothyroxine Sodium | 272 | 89 |
| Amlodipine Besylate | 257 | 94 |
| Losartan Potassium | 236 | 84 |
| Metformin Hcl | 229 | 78 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$55 across 3 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
- 2017-05-19
- Last updated
- 2020-01-09
- Certified
- 2020-01-09
Frequently asked questions
- What is Michael Groshner's NPI number?
- Michael Groshner's National Provider Identifier (NPI) is 1861929952, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Groshner's specialty?
- Michael Groshner is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Groshner located?
- Michael Groshner's practice location on file with NPPES is 620 Shadow Ln, Las Vegas, NV 89106-4119.
- What is Michael Groshner's phone number?
- The practice phone number listed in the NPPES registry for Michael Groshner is (702) 388-4000.
- Does Michael Groshner accept Medicare?
- Michael Groshner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Groshner's NPI active?
- Yes — Michael Groshner's NPI (1861929952) is active in the NPPES registry as of the last update on 2020-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.