2026 NPPES data Family Medicine Physician NPI 1912921685 MD
Verify on CMS →

CAROLYN CHASE, MD

Family Medicine Physician in VENTURA, 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
4K
Medicare Part D claims · 451 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

CAROLYN CHASE, MD filed 4,425 Medicare Part D claims in 2023 as a Family Medicine Physician in VENTURA, California, prescribing 90% generic.

4K
Part D claims, 2023
90%
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.

CAROLYN CHASE, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

4,425 Top 7% higher than 93% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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)

CAROLYN CHASE, 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).

What does the federal data show about CAROLYN CHASE, MD?

Quality data not reported

NPI registry status

Active

Issued 07/27/2006

NPI 1912921685

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

4,425 29% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in California

How Family Medicine Physician compares to other specialties among California providers

California providers

Family Medicine Physician share within California

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Family Medicine 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).

CAROLYN CHASE, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 2953 TELEGRAPH RD STE 110, VENTURA, CA, 93003, with a listed phone of (805) 652-5252. NPI 1912921685 was issued on 07/27/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHASE 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 4,425 prescription claims written by this provider, covering 451 Medicare beneficiaries and totaling roughly $322K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 2.6%. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

2953 TELEGRAPH RD STE 110
VENTURA, CA 93003

Provider Details

NPI 1912921685
Specialty Family Medicine Physician
Credentials MD
Gender Female
NPI Issued 07/27/2006

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 CAROLYN CHASE, MD. To verify CAROLYN CHASE, 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 · Typical

CAROLYN CHASE, MD — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 4,425 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.

4,425
Total Claims
$322K
Total Drug Cost
451
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
10,383
Total Day Supply
304,694
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$236K
Generic Drug Cost
$85K
Opioid Claims
115 (2.6% rate)
Antibiotic Claims
61

Patient Demographics

Average Patient Age
75.3 years
Avg HCC Risk Score
1.09
Gender Split
84% female / 16% male
Age Distribution
<65: 12, 65-74: 239, 75-84: 134, 85+: 66

Top Prescribed Drugs (Medicare Part D)

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

What CAROLYN CHASE, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
369
Amlodipine Besylate
281
Levothyroxine Sodium
234
Lisinopril
178
Escitalopram Oxalate
151
Metoprolol Succinate
131
Hydrochlorothiazide
108
Alendronate Sodium
104
Simvastatin
103
Atenolol
84

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

Family Medicine Physician Overview

How CAROLYN CHASE, MD fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

CAROLYN CHASE, MD's 4,425 claims are above the specialty average of 3,418.

Nearby Family Medicine Physician Providers in California

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is CAROLYN CHASE, MD's specialty?
CAROLYN CHASE, MD specializes in Family Medicine Physician and practices in VENTURA, California. Credentials: MD.
How much does CAROLYN CHASE, MD prescribe under Medicare Part D?
In 2023, CAROLYN CHASE, MD wrote 4,425 Medicare Part D claims totaling $322K in drug costs for 451 beneficiaries.
Where is CAROLYN CHASE, MD located?
CAROLYN CHASE, MD is located at 2953 TELEGRAPH RD STE 110, VENTURA, CA, 93003. Phone: (805) 652-5252.
What is CAROLYN CHASE, MD's NPI number?
CAROLYN CHASE, MD's National Provider Identifier (NPI) is 1912921685, issued on 07/27/2006.
Does CAROLYN CHASE, MD prescribe more brand-name or generic drugs?
CAROLYN CHASE, MD's prescribing is 10% brand-name and 90% generic drugs by claim count, with $236K in brand drug costs.
Does CAROLYN CHASE, MD prescribe opioids?
Yes, CAROLYN CHASE, MD had 115 opioid claims in 2023 with an opioid prescribing rate of 2.6%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does CAROLYN CHASE, MD prescribe most often?
Based on 2023 Medicare Part D data, CAROLYN CHASE, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CAROLYN CHASE, MD accept Medicare?
CAROLYN CHASE, MD appears in CMS Medicare data with 4,425 Part D claims and 451 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CAROLYN CHASE, MD's credentials?
CAROLYN CHASE, MD's NPI is 1912921685 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