What is Justin Chen's NPI number?

Justin Chen's National Provider Identifier (NPI) is 1447526066, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Justin Chen's specialty?

Justin Chen is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).

Where is Justin Chen located?

Justin Chen's practice location on file with NPPES is 301 S Fair Oaks Ave Ste 405, Pasadena, CA 91105-2562.

What is Justin Chen's phone number?

The practice phone number listed in the NPPES registry for Justin Chen is (626) 352-0010.

Does Justin Chen accept Medicare?

Justin Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Justin Chen's NPI active?

Yes — Justin Chen's NPI (1447526066) is active in the NPPES registry as of the last update on 2018-01-29.

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Justin Chen, MD

NPI 1447526066 · Nephrology Physician · Pasadena, CA

Justin Chen, MD is a Nephrology Physician provider in Pasadena, CA (NPI 1447526066).

Provider details

NPI number: 1447526066
Entity type: Individual
Primary specialty: Nephrology PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: Yes
License: 127264 (CA)

Practice location

301 S Fair Oaks Ave Ste 405

Pasadena, CA 91105-2562

Phone: (626) 352-0010

Fax: (626) 226-3520

Street-level locationGet directions

More CA providers

Mailing address

4150 V St # 1110

Sacramento, CA 95817-1460

Specialties & taxonomies

Nephrology PhysicianPrimary207RN0300XLicense 127264 (CA)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(79/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
14 yrs in NPPES registry
Profile completeness28% of score
100% of core fields populated
Practice footprint17% of score
1 documented practice location
Medicare service volume (vs. specialty peers)28% of score
2,345 Medicare services, 2024 (ranked within specialty)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	1,364	$84
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	368	$127
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	184	$143
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	162	$139
Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223	92	$185
Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Losartan Potassium	82	27
Amlodipine Besylate	69	29
Parenteral Amino Acid 20% No.1brand: Prosol	50	—
Carvedilol	50	16
Furosemide	49	22
Allopurinol	36	—
Hydralazine Hcl	36	14
Sodium Zirconium Cyclosilicate

Enumerated: 2012-03-28
Last updated: 2018-01-29

Frequently asked questions

What is Justin Chen's NPI number?: Justin Chen's National Provider Identifier (NPI) is 1447526066, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Justin Chen's specialty?: Justin Chen is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
Where is Justin Chen located?: Justin Chen's practice location on file with NPPES is 301 S Fair Oaks Ave Ste 405, Pasadena, CA 91105-2562.
What is Justin Chen's phone number?: The practice phone number listed in the NPPES registry for Justin Chen is (626) 352-0010.
Does Justin Chen accept Medicare?: Justin Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Justin Chen's NPI active?: Yes — Justin Chen's NPI (1447526066) is active in the NPPES registry as of the last update on 2018-01-29.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	1,364	$84
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	368	$127
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	184	$143
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	162	$139
Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223	92	$185
Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Losartan Potassium	82	27
Amlodipine Besylate	69	29
Parenteral Amino Acid 20% No.1brand: Prosol	50	—
Carvedilol	50	16
Furosemide	49	22
Allopurinol	36	—
Hydralazine Hcl	36	14
Sodium Zirconium Cyclosilicate

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)