NPI registry status
Active
2026 NPPES data Psychiatry Physician NPI 1255368346 M.D.
Verify on CMS → Randall Cullen, M.D.
Psychiatry Physician in Madison, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 53,171 in Psychiatry 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
567
Medicare Part D claims · 47 beneficiaries · Psychiatry Physician avg: 1K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Randall Cullen, M.D. filed 567 Medicare Part D claims in 2023 as a Psychiatry Physician in Madison, Wisconsin, prescribing 83% generic.
- 567
- Part D claims, 2023
- 83%
- generic prescribing
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.
Randall Cullen, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
567 Top 34% higher than 66% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Randall Cullen, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Randall Cullen, M.D.?
Quality data not reportedPrimary specialty
Psychiatry Physician
Medicare Part D claims
567 45% vs specialty avg
Specialty distribution in Wisconsin
How Psychiatry Physician compares to other specialties among Wisconsin 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 Psychiatry 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).
Randall Cullen, M.D. appears in the CMS NPPES registry as a Psychiatry Physician provider holding M.D. credentials at 6333 ODANA RD STE 20, Madison, WI, 53719, with a listed phone of (608) 212-4822. NPI 1255368346 was issued on 06/26/2006.
Medicare Part D records for calendar year 2023 show 567 prescription claims written by this provider, covering 47 Medicare beneficiaries and totaling roughly $255K in drug spend, split 17% brand-name and 83% generic by claim count.
Psychiatry Physician is a high-volume specialty nationwide, with 53,171 enrolled providers across 56 states and an average of 1,038 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1255368346 |
|---|---|
| Specialty | Psychiatry Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/26/2006 |
Brand vs generic prescribing mix · Typical
Randall Cullen, M.D. - brand share 17.0%
Psychiatry Physician average
17% brand-name claims vs 83% generic, on 567 2023 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 2023.
567
Total Claims
$255K
Total Drug Cost
47
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 614
- Total Day Supply
- 16,272
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $217K
- Generic Drug Cost
- $37K
Patient Demographics
- Average Patient Age
- 54.4 years
- Avg HCC Risk Score
- 1.26
- Gender Split
- 53% female / 47% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Randall Cullen, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clonazepam
Clonazepam
54 claims
- Clozapine
Clozapine
33 claims
- Quetiapine Fumarate
Quetiapine Fumarate
32 claims
- Risperidone
Risperidone
23 claims
- Trazodone Hcl
Trazodone Hcl
22 claims
- Gabapentin 21
Gabapentin
21 claims
- Bupropion Xl 20
Bupropion Xl
20 claims
- Lorazepam 18
Lorazepam
18 claims
| Drug | Claims |
|---|---|
| Clonazepam | 54 |
| Clozapine | 33 |
| Quetiapine Fumarate | 32 |
| Risperidone | 23 |
| Trazodone Hcl | 22 |
| Gabapentin | 21 |
| Bupropion Xl Bupropion Hcl | 20 |
| Lorazepam | 18 |
| Propranolol Hcl | 17 |
| Vraylar Cariprazine Hcl | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Psychiatry Physician Overview
How Randall Cullen, M.D. fits within the Psychiatry Physician landscape nationally.
53,171
Psychiatry Physician Providers in US
56
States with Psychiatry Physician
1,038
Avg Claims per Provider
Randall Cullen, M.D.'s 567 claims are below the specialty average of 1,038.
Nearby Psychiatry Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Cullen.
Dr. Semhal Abbay
MD
Green Bay, WI
Dr. Beth Abramson
M.D.
Milwaukee, WI
Dr. Sean Ackerman
M.D.
Columbus, WI
Dr. Nagwa Agaiby
M.D.
Milwaukee, WI
Dr. Himanshu Agrawal
M.D.
Milwaukee, WI
Compare Psychiatry Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Wisconsin medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Psychiatry Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Randall Cullen, M.D.'s specialty? ▼
Randall Cullen, M.D. specializes in Psychiatry Physician and practices in Madison, Wisconsin. Credentials: M.D..
How much does Randall Cullen, M.D. prescribe under Medicare Part D? ▼
In 2023, Randall Cullen, M.D. wrote 567 Medicare Part D claims totaling $255K in drug costs for 47 beneficiaries.
Where is Randall Cullen, M.D. located? ▼
Randall Cullen, M.D. is located at 6333 ODANA RD STE 20, Madison, WI, 53719. Phone: (608) 212-4822.
What is Randall Cullen, M.D.'s NPI number? ▼
Randall Cullen, M.D.'s National Provider Identifier (NPI) is 1255368346, issued on 06/26/2006.
Does Randall Cullen, M.D. prescribe more brand-name or generic drugs? ▼
Randall Cullen, M.D.'s prescribing is 17% brand-name and 83% generic drugs by claim count, with $217K in brand drug costs.
How many Psychiatry Physician providers are there in the US? ▼
There are 53,171 Psychiatry Physician providers across 56 states in the US. The average Psychiatry Physician provider writes 1,038 Medicare Part D claims per year.
What drugs does Randall Cullen, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Randall Cullen, M.D.'s most frequently prescribed drugs include Clonazepam, Clozapine, Quetiapine Fumarate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Randall Cullen, M.D. accept Medicare? ▼
Randall Cullen, M.D. appears in CMS Medicare data with 567 Part D claims and 47 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Randall Cullen, M.D.'s credentials? ▼
Randall Cullen, M.D.'s NPI is 1255368346 with credentials M.D.. 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 (2023). 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 April 2026 (NPPES) / 2023 (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
Compiled from official public sources by the PlainDoctor editorial team.
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 May 2026.