NPI registry status
Active
2026 NPPES data Neurology Physician NPI 1932181849 DO
Verify on CMS → Mark Friedman, DO
Neurology Physician in Columbia, South Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 20,467 in Neurology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
902
Medicare Part D claims · 217 beneficiaries · Neurology Physician avg: 1K
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$122.56
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Mark Friedman, DO filed 902 Medicare Part D claims in 2024 as a Neurology Physician in Columbia, South Carolina, prescribing 95% generic.
- 902
- Part D claims, 2024
- 95%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥74th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Mark Friedman, DO
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1932181849), first enumerated 11/16/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 902 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$122.56 in reported industry payments (1 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1932181849 · Neurology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1932181849
- ENUM-LEGACY 2005
- TAX-MID 20K Neurology Physician
- RX-LIGHT 902
- BOOK-THIN 306 in South Carolina
- PHOTO-ENUM Rashmi Gupta · 2005
Mark Friedman, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
902 ≥ 74th percentile 74% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Mark Friedman, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Mark Friedman, DO?
Quality data not reportedPrimary specialty
Neurology Physician
Medicare Part D claims
902 33% vs specialty avg
Specialty distribution in South Carolina
How Neurology Physician compares to other specialties among South Carolina providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Neurology Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1932181849 |
|---|---|
| Specialty | Neurology Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 11/16/2005 |
Hospital and facility affiliations
Facilities where Mark Friedman, DO bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Cgh Medical Center
★☆☆☆☆ 1/5
Sterling, IL
Acute Care Hospitals
CMS CCN: 140043
Prisma Health Medical Group-Midlands
Columbia, SC
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Mark Friedman, DO. Source: openpaymentsdata.cms.gov.
Total received
$123
Largest payer
Eisai Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Generic-heavy
Mark Friedman, DO - brand share 5.0%
Neurology Physician average
5% brand-name claims vs 95% generic, on 902 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
902
Total Claims
$35K
Total Drug Cost
217
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,421.733
- Total Day Supply
- 41,361
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $15K
- Generic Drug Cost
- $20K
Patient Demographics
- Average Patient Age
- 73.0 years
- Avg HCC Risk Score
- 1.45
- Gender Split
- 67% female / 33% male
- Age Distribution
- <65: 31, 65-74: 74, 75-84: 84, 85+: 28
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mark Friedman, DO prescribes most
Top Medicare Part D drugs by claim count, 2024
- Memantine Hcl
Memantine Hcl
195 claims
- Donepezil Hcl
Donepezil Hcl
188 claims
- Gabapentin
Gabapentin
80 claims
- Carbidopa-Levodopa 40
Carbidopa-Levodopa
40 claims
- Rizatriptan 38
Rizatriptan
38 claims
- Escitalopram Oxalate 35
Escitalopram Oxalate
35 claims
- Tizanidine Hcl 32
Tizanidine Hcl
32 claims
- Topiramate 27
Topiramate
27 claims
| Drug | Claims |
|---|---|
| Memantine Hcl | 195 |
| Donepezil Hcl | 188 |
| Gabapentin | 80 |
| Carbidopa-Levodopa Carbidopa/Levodopa | 40 |
| Rizatriptan Rizatriptan Benzoate | 38 |
| Escitalopram Oxalate | 35 |
| Tizanidine Hcl | 32 |
| Topiramate | 27 |
| Rivastigmine Rivastigmine Tartrate | 22 |
| Levothyroxine Sodium | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurology Physician Overview
How Mark Friedman, DO fits within the Neurology Physician landscape nationally.
20,467
Neurology Physician Providers in US
54
States with Neurology Physician
1,356
Avg Claims per Provider
Mark Friedman, DO's 902 claims are below the specialty average of 1,356.
Nationwide Neurology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Friedman, both outside South Carolina so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Neurology Physician Providers in South Carolina
Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as Friedman.
One of 306 Neurology Physician providers enrolled in South Carolina, 5 are shown here.
Dr. Line Abdul Rahman
MD
Charleston, SC
Dr. Eunice Abrams
M.D.
Florence, SC
Dr. John Absher
M.D.
Greenville, SC
Dr. Ahmad Abu Qdais
MD
Charleston, SC
Dr. Julian Adams
M.D.
Columbia, SC
Compare Neurology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Friedman, DO's specialty? ▼
Mark Friedman, DO specializes in Neurology Physician and practices in Columbia, South Carolina. Credentials: DO.
How much does Mark Friedman, DO prescribe under Medicare Part D? ▼
In 2024, Mark Friedman, DO wrote 902 Medicare Part D claims totaling $35K in drug costs for 217 beneficiaries.
Where is Mark Friedman, DO located? ▼
Mark Friedman, DO is located at 8 RICHLAND MEDICAL PARK DR STE 420, Columbia, SC, 29203. Phone: (803) 434-8050.
What is Mark Friedman, DO's NPI number? ▼
Mark Friedman, DO's National Provider Identifier (NPI) is 1932181849, issued on 11/16/2005.
Does Mark Friedman, DO prescribe more brand-name or generic drugs? ▼
Mark Friedman, DO's prescribing is 5% brand-name and 95% generic drugs by claim count, with $15K in brand drug costs.
How many Neurology Physician providers are there in the US? ▼
There are 20,467 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,356 Medicare Part D claims per year.
What drugs does Mark Friedman, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, Mark Friedman, DO's most frequently prescribed drugs include Memantine Hcl, Donepezil Hcl, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Friedman, DO accept Medicare? ▼
Mark Friedman, DO appears in CMS Medicare data with 902 Part D claims and 217 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Friedman, DO's credentials? ▼
Mark Friedman, DO's NPI is 1932181849 with credentials DO. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.