2026 NPPES data Psychiatry Physician NPI 1164549077 MD
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RUSTIN BERLOW, MD

Psychiatry Physician in DEL MAR, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
448
Medicare Part D claims · 32 beneficiaries · Psychiatry Physician avg: 1K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: RUSTIN BERLOW, MD is a Psychiatry Physician ([object Object]) practicing in DEL MAR, California with a Medicare Part D prescribing footprint of 448 claims across 32 beneficiaries — 8% brand-name prescribing .

What stands out: RUSTIN BERLOW, MD filed 448 Medicare Part D claims in 2023 across DEL MAR, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

RUSTIN BERLOW, MD 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).

RUSTIN BERLOW, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 03/24/2007

NPI 1164549077

Primary specialty

Psychiatry Physician

High-volume

53,104 US NPIs in this specialty

Medicare Part D claims

448 57% vs specialty avg

2023 prescription claims

Specialty avg: 1,038

Specialty distribution in California

How Psychiatry Physician compares to other specialties among California providers

California providers

Psychiatry Physician share within California

1. Psychiatry Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Psychiatry Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Psychiatry Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Psychiatry Physician ABMS/AOA estimate

Est. board-certified rate (Psychiatry Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Psychiatry Physician) — ABMS / AOA estimate

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).

RUSTIN BERLOW, MD is a Psychiatry Physician provider practicing in DEL MAR, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1164549077. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

RUSTIN BERLOW, MD appears in the CMS NPPES registry as a Psychiatry Physician provider holding MD credentials at 1104 CAMINO DEL MAR, DEL MAR, CA, 92014, with a listed phone of (619) 894-4489. NPI 1164549077 was issued on 03/24/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BERLOW most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 448 prescription claims written by this provider, covering 32 Medicare beneficiaries and totaling roughly $47K in drug spend, split 8% brand-name and 92% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Psychiatry Physician is a high-volume specialty nationwide, with 53,104 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

1104 CAMINO DEL MAR
DEL MAR, CA 92014

Provider Details

NPI 1164549077
Specialty Psychiatry Physician
Credentials MD
Gender Male
NPI Issued 03/24/2007

License & disciplinary context — California MBC 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 — they are NOT specific to RUSTIN BERLOW, MD. To verify RUSTIN BERLOW, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

RUSTIN BERLOW, MD — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 448 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.

448
Total Claims
$47K
Total Drug Cost
32
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
687
Total Day Supply
20,410
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$31K
Generic Drug Cost
$16K

Patient Demographics

Average Patient Age
68.7 years
Avg HCC Risk Score
0.84

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Lorazepam
47
Duloxetine Hcl
37
Sertraline Hcl
32
Aripiprazole
30
Desvenlafaxine Succinate Er
Desvenlafaxine Succinate
29
Bupropion Hcl Sr
Bupropion Hcl
22
Bupropion Xl
Bupropion Hcl
20
Lithium Carbonate
18
Dexmethylphenidate Hcl
17
Quetiapine Fumarate
16

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Psychiatry Physician Overview

How RUSTIN BERLOW, MD fits within the Psychiatry Physician landscape nationally.

53,104
Psychiatry Physician Providers in US
56
States with Psychiatry Physician
1,038
Avg Claims per Provider

RUSTIN BERLOW, MD's 448 claims are below the specialty average of 1,038.

Nearby Psychiatry Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as BERLOW.

Compare Psychiatry Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is RUSTIN BERLOW, MD's specialty?
RUSTIN BERLOW, MD specializes in Psychiatry Physician and practices in DEL MAR, California. Credentials: MD.
How much does RUSTIN BERLOW, MD prescribe under Medicare Part D?
In 2023, RUSTIN BERLOW, MD wrote 448 Medicare Part D claims totaling $47K in drug costs for 32 beneficiaries.
Where is RUSTIN BERLOW, MD located?
RUSTIN BERLOW, MD is located at 1104 CAMINO DEL MAR, DEL MAR, CA, 92014. Phone: (619) 894-4489.
What is RUSTIN BERLOW, MD's NPI number?
RUSTIN BERLOW, MD's National Provider Identifier (NPI) is 1164549077, issued on 03/24/2007.
Does RUSTIN BERLOW, MD prescribe more brand-name or generic drugs?
RUSTIN BERLOW, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $31K in brand drug costs.
How many Psychiatry Physician providers are there in the US?
There are 53,104 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 RUSTIN BERLOW, MD prescribe most often?
Based on 2023 Medicare Part D data, RUSTIN BERLOW, MD's most frequently prescribed drugs include Lorazepam, Duloxetine Hcl, Sertraline Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RUSTIN BERLOW, MD accept Medicare?
RUSTIN BERLOW, MD appears in CMS Medicare data with 448 Part D claims and 32 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RUSTIN BERLOW, MD's credentials?
RUSTIN BERLOW, MD's NPI is 1164549077 with credentials MD. 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

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