Dr. Kan P Chen , DO
Specialist โข Oceanside, CA
4002 Vista Way
Oceanside, CA 920564506
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 August 8, 2007; this date does not establish years in practice.
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Published CMS data list 20 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99221 โ Initial hospital care with straightforward or low level of medical decision making, per day: 20 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 108 Medicare Part D prescriptions, including refills, in 2020.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2020. Published rows only; this is not a quality measure.
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Published Part D records, 2020:
- Furosemide โ 22 prescription fills, including refills.
- K-Tab Er (Potassium Chloride) โ 20 prescription fills, including refills.
- Lisinopril โ 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2020. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 8 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 95% of clinicians listed under Specialist in California (2024, 982 clinicians with data). Median for this group: 1,451. Middle half: 402 to 4,254.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 14 in 2023 to 20 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023โ2024.
Practice Location & Contact Primary Location
4002 Vista Way
Oceanside, CA 920564506
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: Southern California Permanente Medical Group. 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
Kansas City Medical College
2004
What Public CMS Data Show
Specialist: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
21 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $1,668 in 2024
The total amount Medicare approved for these services in 2024. 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 โ by Provider and Service, 2024.
Paid by Medicare
About $1,329 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, 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 โ by Provider and Service, 2024.
30-day fills
270 standardized 30-day fills in 2020
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
$1,783 in 2020
The total cost of these prescriptions in 2020, 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 โ by Provider and Drug, 2020.
Years since graduation
22 years (graduated 2004)
CMS Doctors and Clinicians data list 2004 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
2007
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, โDoes your provider accept Medicare as full payment?โ
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 Oceanside and California
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 95% of clinicians listed under Specialist in California (2024, 982 clinicians with data). Median for this group: 1,451. Middle half: 402 to 4,254.
Too few clinicians listed under Specialist in Oceanside have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 95% of clinicians listed under Specialist in California (2024, 982 clinicians with data). Median for this group: $122,564. Middle half: $40,064 to $306,851.
Too few clinicians listed under Specialist in Oceanside have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 95% of clinicians listed under Specialist in California (2024, 982 clinicians with data). Median for this group: $92,950. Middle half: $29,370 to $232,247.
Too few clinicians listed under Specialist in Oceanside have Medicare Part B data for 2024 to compare.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Chen are from 2020.
30 active clinicians are listed under Specialist with a practice address in Oceanside, CA (5,756 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Oceanside
13.3% of these 30 clinicians have the CMS telehealth indicator.
30% of these 30 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 went from 14 in 2023 to 20 in 2024.
- 2023: 14
- 2024: 20
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Medicare-allowed amount
Medicare-allowed amount increased 40% from $1,195 in 2023 to $1,668 in 2024.
- 2023: $1,195
- 2024: $1,668
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Paid by Medicare
Paid by Medicare went from $814 in 2023 to $1,329 in 2024.
- 2023: $814
- 2024: $1,329
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 84% from 670 in 2016 to 108 in 2020.
- 2016: 670
- 2017: 322
- 2018: 147
- 2019: 315
- 2020: 108
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30-day fills
30-day fills decreased 83% from 1,581 in 2016 to 270 in 2020.
- 2016: 1,581
- 2017: 764
- 2018: 274
- 2019: 689
- 2020: 270
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Part D drug cost
Part D drug cost decreased 97% from $70,167 in 2016 to $1,783 in 2020.
- 2016: $70,167
- 2017: $35,151
- 2018: $4,179
- 2019: $13,140
- 2020: $1,783
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2020), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2022โ2023 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 โ by Provider and Service data, 2023โ2024; 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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99221
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes
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20 | 20 | $256.00 | $83.41 |
Source: CMS Part B by Provider and Service, 2024; 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 2020.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Furosemide | Furosemide | 22 | 1,376 | $309.44 | 17 |
| K-Tab Er | Potassium Chloride | 20 | 1,794 | $670.12 | 13 |
| Lisinopril | Lisinopril | 11 | 1,100 | $105.02 | โ |
| Metoprolol Tartrate | Metoprolol Tartrate | 11 | 1,100 | $109.28 | โ |
| Cephalexin | Cephalexin | 11 | 68 | $112.98 | 11 |
| Atorvastatin Calcium | Atorvastatin Calcium | 11 | 880 | $168.56 | โ |
| Tamsulosin Hcl | Tamsulosin Hcl | 11 | 937 | $207.33 | โ |
| Hydralazine Hcl | Hydralazine Hcl | 11 | 540 | $99.98 | โ |
Source: CMS Part D by Provider and Drug, 2020; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 174400000X
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 208M00000X
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - HOSPITALIST
I20071116000380
CA
4981792470
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
Southern California Permanente Medical Group
9455 Clairemont Mesa Blvd, San Diego, CA 921231297
Phone: 8585731504
Southern California Permanente Medical Group
4647 Zion Ave, San Diego, CA 921202507
Phone: 6195285000
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 - Medical
Physician Assistant (Certified)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine - Geriatric Medicine
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
MDMSPH
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Hospitalist (license number reported to NPPES: CA 20A10070)
NPI status registered as active in NPPES database
Registered at 4002 VISTA WAY, OCEANSIDE, CA 920564506 (Tel: 7607248411)
Registered at 3156 VISTA WAY STE 405, OCEANSIDE, CA 920563622 (Tel: 7604396581)
Recorded as KAN CHEN, D.O.
Specialist (license number reported to NPPES: CA 20A10070)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Specialists in Oceanside
- Dr. Gustavo Lugo, MD
- Dr. Julie Aspiras, MD
- Jenelle Christian
- Dr. Katayoun Toosie, MD
- Dr. Robert Wailes, MD
- Dr. Marco Grossi, PT, DPT
Mailing Address
3156 Vista Way Ste 405
Oceanside, CA 920563622
Phone: 7604396581