Dr. David Chen , MD
General Practice • Santa Ana, CA
719 E 1st St Ste C
Santa Ana, CA 927015330
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on July 14, 2005; this date does not establish years in practice.
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Published CMS data list 15 Original Medicare Part B services in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Published rows only; this is not a quality measure.
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Published Part B service records, 2020:
- 99213 — Established patient outpatient office visit: 15 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2019 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2020). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Published CMS data list 4,081 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium — 410 prescription fills, including refills.
- Losartan Potassium — 327 prescription fills, including refills.
- Amlodipine Besylate — 308 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 83 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 65% of clinicians listed under General Practice in Santa Ana, CA (2024, 14 clinicians with data). Median for this group: 1,512. Middle half: 67 to 4,269.
More Part D prescriptions than 75% of clinicians listed under General Practice in California (2024, 610 clinicians with data). Median for this group: 758. Middle half: 125 to 3,707.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 226 in 2017 to 15 in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2020.
Practice Location & Contact Primary Location
719 E 1st St Ste C
Santa Ana, CA 927015330
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Garfield Health Center. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
1979
What Public CMS Data Show
General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $1,251 in 2020
The total amount Medicare approved for these services in 2020. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020.
Paid by Medicare
About $327 in 2020
The part of the Medicare-allowed amount that Medicare itself paid in 2020, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020.
30-day fills
6,967 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$379,096 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $16.40 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
Years since graduation
47 years (graduated 1979)
CMS Doctors and Clinicians data list 1979 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2005
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Chen has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Chen as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Santa Ana and California
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 65% of clinicians listed under General Practice in Santa Ana, CA (2024, 14 clinicians with data). Median for this group: 1,512. Middle half: 67 to 4,269.
More Part D prescriptions than 75% of clinicians listed under General Practice in California (2024, 610 clinicians with data). Median for this group: 758. Middle half: 125 to 3,707.
Part D drug cost
A higher Part D drug cost than 65% of clinicians listed under General Practice in Santa Ana, CA (2024, 14 clinicians with data). Median for this group: $109,977. Middle half: $897 to $647,567.
A higher Part D drug cost than 80% of clinicians listed under General Practice in California (2024, 610 clinicians with data). Median for this group: $48,894. Middle half: $2,044 to $279,308.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Chen are from 2020.
27 active clinicians are listed under General Practice with a practice address in Santa Ana, CA (1,963 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Santa Ana
11.1% of these 27 clinicians have the CMS telehealth indicator.
37% of these 27 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 93% from 226 in 2017 to 15 in 2020.
- 2017: 226
- 2020: 15
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Medicare-allowed amount
Medicare-allowed amount decreased 92% from $16,155 in 2017 to $1,251 in 2020.
- 2017: $16,155
- 2020: $1,251
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Paid by Medicare
Paid by Medicare decreased 96% from $9,010 in 2017 to $327 in 2020.
- 2017: $9,010
- 2020: $327
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 129% from 1,785 in 2020 to 4,081 in 2024.
- 2020: 1,785
- 2021: 2,972
- 2022: 3,126
- 2023: 3,961
- 2024: 4,081
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30-day fills
30-day fills increased 176% from 2,526 in 2020 to 6,967 in 2024.
- 2020: 2,526
- 2021: 3,909
- 2022: 5,017
- 2023: 6,828
- 2024: 6,967
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Part D drug cost
Part D drug cost increased 129% from $165,393 in 2020 to $379,096 in 2024.
- 2020: $165,393
- 2021: $289,917
- 2022: $332,785
- 2023: $469,729
- 2024: $379,096
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $117.16 in 2021 to $16.40 in 2025.
- 2021: $117.16
- 2022: $44.75
- 2023: $13.78
- 2024: $42.08
- 2025: $16.40
Sources: CMS Medicare Physician & Other Practitioners (2020), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $16.40.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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JARDIANCE | General | $16.40 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2019 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2020; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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15 | 14 | $190.00 | $83.38 |
Source: CMS Part B by Provider and Service, 2020; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 410 | 24,121 | $2,579.58 | 135 |
| Losartan Potassium | Losartan Potassium | 327 | 17,334 | $1,662.84 | 99 |
| Amlodipine Besylate | Amlodipine Besylate | 308 | 15,684 | $1,085.30 | 82 |
| Metformin Hcl | Metformin Hcl | 234 | 13,082 | $1,418.16 | 71 |
| Alendronate Sodium | Alendronate Sodium | 208 | 9,112 | $911.68 | 51 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 145 | 6,494 | $946.39 | 31 |
| Jardiance | Empagliflozin | 128 | 5,518 | $103,354.50 | 31 |
| Lisinopril | Lisinopril | 93 | 5,527 | $577.02 | 27 |
| Tamsulosin Hcl | Tamsulosin Hcl | 82 | 4,965 | $804.14 | 34 |
| Ezetimibe | Ezetimibe | 81 | 3,310 | $1,091.98 | 18 |
| Metoprolol Succinate | Metoprolol Succinate | 78 | 3,330 | $664.20 | 16 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 72 | 2,542 | $2,791.52 | 36 |
| Hydrochlorothiazide | Hydrochlorothiazide | 70 | 3,630 | $188.98 | 16 |
| Levothyroxine Sodium | Levothyroxine Sodium | 64 | 4,050 | $885.30 | 20 |
| Metformin Hcl Er | Metformin Hcl | 64 | 2,460 | $341.09 | 12 |
| Atenolol | Atenolol | 48 | 2,130 | $83.26 | 11 |
| Alcohol Prep Pads | Alcohol Antiseptic Pads | 47 | 2,645 | $433.44 | 25 |
| Simvastatin | Simvastatin | 46 | 2,670 | $189.32 | 11 |
| Telmisartan | Telmisartan | 44 | 1,980 | $638.69 | — |
| Metoprolol Tartrate | Metoprolol Tartrate | 41 | 2,695 | $233.70 | 15 |
| Rybelsus | Semaglutide | 40 | 1,590 | $48,787.92 | — |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 39 | 1,145 | $214.40 | 28 |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 39 | 1,904 | $453.75 | 12 |
| Allopurinol | Allopurinol | 38 | 1,672 | $250.10 | — |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 38 | 2,070 | $285.01 | 11 |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - EMERGENCY MEDICINE
I20040301001066
CA
6204723604
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Garfield Health Center
701 S Atlantic Blvd, Monterey Park, CA 917543845
Phone: 6263009980
Garfield Health Center
701 S Atlantic Blvd, Montery Park, CA 917541746
Garfield Health Center
210 N Garfield Ave, Monterey Park, CA 917541746
Garfield Health Center
210 N Garfield Ave, Monterey Park, CA 917541746
Phone: 6263077397
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant
PHYSICIANASSISTANT
Career & Practice History
NPI enumerated July 14, 2005.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other General Practices in Santa Ana
- Dr. Robert Balette, MD
- Dr. Martin Offenberger, MD
- Dr. Fariba Shokoohy, MD
- Dr. Joseph Serna, MD
- Dr. Scott Wilchek, DO
- Dr. Dennis Stolpner, MD
More public profiles in California
Directory navigation, in NPI number order.
- Frederick Lee, DMD Dentist - General Practice · Hemet
- Rattehalli Sudesh, MD Ophthalmology · Santa Clara
- Sumit Majumder, MD Internal Medicine - Infectious Disease · Los Gatos
- Hung Do, DDS Dentist - Endodontics · Folsom
- Victor Silvestre, MD Internal Medicine · Oakland
- David Seidman, MD Orthopaedic Surgery · Oakland
- Melchor Ong, MD Internal Medicine · Clovis
- Ali Behzadnia, MD FACP Internal Medicine - Endocrinology, Diabetes & Metabolism · Costa Mesa
- Daniel Klein, MD Internal Medicine - Infectious Disease · Hayward
- Gopika Gangupantula, MD Family Medicine · Modesto
- Kemin Zhang, MD Internal Medicine · Stockton
- Christopher Forrest, MD Internal Medicine - Interventional Cardiology · Walnut Creek
Mailing Address
719 East 1st. Street, Suite C
Santa Ana, CA 92701
Phone: 7145470104