Mark Freiberg, M.D.
NPI 1770536450 · Critical Care Medicine (Internal Medicine) Physician · Saint Paul, MN
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Freiberg, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Saint Paul, MN (NPI 1770536450).
Provider details
- NPI number
- 1770536450
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 32862 (MN)
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 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
169 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 57 | $199 |
| Home Sleep Test (hst) With Type III Portable Monitor, Unattended; Minimum of 4 Channels: 2 Respiratory Movement/Airflow, 1 Ecg/Heart Rate and 1 Oxygen SaturationG0399 | 30 | $44 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 21 | $112 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 18 | $89 |
| Sleep Study in Sleep Lab (6 Years Or Older)95810 | 16 | $113 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 37 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 21 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 17 |
| Prednisone | 16 |
| Montelukast Sodium | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-17
- Last updated
- 2020-11-10
- Certified
- 2020-11-10
Frequently asked questions
- What is Mark Freiberg's NPI number?
- Mark Freiberg's National Provider Identifier (NPI) is 1770536450, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Freiberg's specialty?
- Mark Freiberg is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Freiberg located?
- Mark Freiberg's practice location on file with NPPES is 255 Smith Ave N, Saint Paul, MN 55102-2572.
- What is Mark Freiberg's phone number?
- The practice phone number listed in the NPPES registry for Mark Freiberg is (651) 726-6200.
- Does Mark Freiberg accept Medicare?
- Mark Freiberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Freiberg's NPI active?
- Yes — Mark Freiberg's NPI (1770536450) is active in the NPPES registry as of the last update on 2020-11-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.