Dr. Gabriel Stephan Niles, MD

  • Los Angeles, CA
  • Family medicine physician
NPI1285611699PAC ID2264601012
Medicare services, 2024
587
Medicare patients, 2024
181
Part D claims, 2024
2,123
MIPS score, 2024
90
Hospital affiliations
1
Practice address
12555 W Jefferson Blvd Suite 301 Suite 301, Los Angeles, CA 90066-7032
Practice phone
Call (424) 443-5530
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Saint John's Physician Partners

Multi-specialty group site · Los Angeles, California

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Dr. Gabriel Stephan Niles is a family medicine physician in Los Angeles, California

Dr. Niles practices at Saint John's Physician Partners in Los Angeles, California.

Dr. Niles' NPI, 1285611699, was assigned on December 28, 2005. Dr. Niles graduated from Keck School of Medicine of USC in 2005. Dr. Niles holds California license A100831.

NPI and contact details
Medicare PAC ID
2264601012
NPI enumeration date
December 28, 2005
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(424) 443-5530
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
47
Medical school graduation
2005

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Gabriel Stephan Niles practices at Saint John's Physician Partners in Los Angeles, California

Dr. Niles' primary practice is Saint John's Physician Partners, at 12555 W Jefferson Blvd Suite 301 Suite 301, Los Angeles, CA 90066-7032. The practice phone is (424) 443-5530.

  • Saint John's Physician Partners
    12555 W Jefferson Blvd Suite 301 Suite 301, Los Angeles, CA 90066-7032Phone(424) 443-5530

Source: Dmand AI Affiliation Data

Dr. Gabriel Stephan Niles is affiliated with 2 sites of care and 1 medical group

Dr. Niles' primary practice is Saint John's Physician Partners in Los Angeles, California. Dr. Niles is also affiliated with Providence Saint John's Health Center. The medical group on file is Saint John's Physician Partners.

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Gabriel Stephan Niles' practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Niles practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Saint John's Physician PartnersAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Gabriel Stephan Niles is one of 15,680 family medicine physicians in California

Family medicine is Dr. Niles' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Niles is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Dr. Niles' licenses on file in 3 states: California, Washington and Wisconsin.

Specialties and state licenses

  • Family medicine, CaliforniaPrimaryLicense A100831 · 2007 to 2026 · taxonomy 207Q00000X
  • Washington licenseLicense MD6030955 · 2015 to 2017
  • Wisconsin license2006 to 2009

Clinical focus

Dmand AI lists ADHD, adjustment disease, alzheimer's disease, anxiety, arthritis, asthma, chronic anemia and chronic diabetes among the conditions Dr. Niles treats.

Family medicine physicians near Dr. Niles

Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Gabriel Stephan Niles billed Medicare for 587 services in 2024

CMS data shows 587 Medicare services from Dr. Niles across 10 procedure codes in 2024, for 181 Medicare patients. Medicare paid $56,074 for them. Every service was in an office.

Medicare services, 2024587
Medicare patients181
Paid by Medicare$56,074
Procedure codes10

Dr. Niles' Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 4072024: 4459%
Other services
2023: 802024: 11443%
Tests and treatments
2023: 312024: 2810%

Dr. Niles compared with the California median for family medicine physicians, 2024

  • Dr. Niles
  • California median
Medicare services
587vs 2462.4 times
Medicare patients
181vs 11853% above
Part D claims
1,477vs 83377% above

Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.

Dr. Niles' most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Niles

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Gabriel Stephan Niles treated 181 Medicare patients in 2024, average age 73

CMS counts 181 Medicare patients who saw Dr. Niles in 2024. The largest group is 65 to 74, with 103 patients. 72% of them have high cholesterol, and 50% have high blood pressure. 8% are also on Medicaid. Their average risk score is 0.89, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Niles' median patient age at 54, with 48% women.

Medicare patients, 2024181
Average age73
Average risk score0.89
Also on Medicaid8%

Dr. Niles' Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Niles' Medicare patients by sex, 2024

  • Women10659%
  • Men7541%

Chronic conditions among Dr. Niles' Medicare patients, 2024

  1. High cholesterol72%
  2. High blood pressure50%
  3. Arthritis44%
  4. Anxiety28%
  5. Ischemic heart disease22%
  6. Mood disorders22%
  7. Osteoporosis20%
  8. Depression17%

Share of Medicare patients with each condition. A patient can have several.

Dr. Niles' patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 54

Patient panel by sex, all payers

  • Women48%
  • Men51%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Gabriel Stephan Niles wrote 2,123 Medicare Part D claims in 2024

In 2024, Dr. Niles wrote 2,123 Medicare Part D claims for 235 patients. 89% of them were for generic drugs. CMS names the drug for 1,477 of them, across 52 drugs with 11 or more claims each, at $60,534 in total drug cost. In 2023, CMS named 1,232 claims across 48 drugs.

Part D claims, 20242,123
Drugs named by CMS52
Total drug cost$60,534
Part D patients235

Dr. Niles' Part D claims by kind of drug, 2024

  • Generic1,889 claims89%
  • Brand-name219 claims10%
  • Other15 claims1%

Dr. Niles' most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Niles' Part D claims, 2024

  • Opioids1%27 of 2,123 claims
  • Antibiotics1%16 of 2,123 claims
  • Antipsychotics, patients 65 and over1%12 of 2,123 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1,2322024: 1,47720%

Drugs named by CMS: 52 in 2024, 48 in 2023.

See all prescribing by Dr. Niles

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Gabriel Stephan Niles scored 90 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Dr. Niles for performance year 2024, reported as part of a group. Dr. Niles accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Niles as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Niles' MIPS scores, performance year 2024

  • 90of 100Final score
  • 96.1of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 72of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Gabriel Stephan Niles received $3,841 in industry payments from 2016 to 2025

CMS Open Payments shows 177 general payments to Dr. Niles from 37 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $686.

General payments to Dr. Niles by program year, 2016 to 2025

Companies that paid Dr. Niles the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Niles

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Gabriel Stephan Niles graduated from Keck School of Medicine of USC

Dr. Niles graduated from Keck School of Medicine of USC in 2005.

  1. Medical schoolKeck School of Medicine of USC
  2. Board certified in family medicineAmerican Board of Family Medicine

Source: Dmand AI Professional Profile Data

Dr. Gabriel Stephan Niles accepts plans from 10 insurance carriers

Dr. Niles is in network with 10 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • Elevance
  • HCSC
  • Regence Health Plans
  • United Healthcare
  • Blue Cross and Blue Shield of Kansas City
  • +2 more carriersWith a free account

Plan types Dr. Niles accepts, by number of carriers

  1. Medicare6
  2. HMO5
  3. PPO5
  4. POS3
  5. EPO2
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Gabriel Stephan Niles's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Gabriel Stephan Niles

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Gabriel Stephan Niles' NPI number?

Dr. Gabriel Stephan Niles' NPI number is 1285611699. It was assigned on December 28, 2005, and it is active in the NPI Registry.

What kind of doctor is Dr. Gabriel Stephan Niles?

Dr. Gabriel Stephan Niles is a family medicine physician in Los Angeles, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).

Where does Dr. Gabriel Stephan Niles practice?

Dr. Niles practices at 12555 W Jefferson Blvd Suite 301 Suite 301, Los Angeles, CA 90066-7032. Dr. Niles' primary practice is Saint John's Physician Partners in Los Angeles, California.

What is Dr. Gabriel Stephan Niles' office phone number?

The practice phone on file for Dr. Niles is (424) 443-5530.

What is Dr. Gabriel Stephan Niles' medical license number?

Dr. Niles holds California license A100831, one of the licenses on file in 3 states.

Which states has Dr. Gabriel Stephan Niles been licensed in?

Dmand AI has state licenses on file for Dr. Niles in California (2007 to 2026), Washington (2015 to 2017) and Wisconsin (2006 to 2009).

Which hospitals is Dr. Gabriel Stephan Niles affiliated with?

Dr. Niles is affiliated with Providence Saint John's Health Center.

What medical group is Dr. Gabriel Stephan Niles part of?

Dr. Niles is linked to Saint John's Physician Partners.

Does Dr. Gabriel Stephan Niles accept Medicare?

Yes. CMS data shows Dr. Niles billed Medicare for 587 services in 2024, and Dr. Niles accepts Medicare assignment.

Does Dr. Gabriel Stephan Niles offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Niles as offering telehealth services.

Show 9 more questionsShow fewer questions

What is Dr. Gabriel Stephan Niles' MIPS score?

Dr. Niles' MIPS final score for performance year 2024 is 90 out of 100, reported as part of a group.

How many Medicare patients does Dr. Gabriel Stephan Niles see?

CMS counts 181 Medicare patients who saw Dr. Niles in 2024, with an average age of 73.

Is Dr. Gabriel Stephan Niles board certified?

Yes. Dr. Niles is board certified in family medicine by the American Board of Family Medicine.

What services does Dr. Gabriel Stephan Niles bill to Medicare?

In 2024, Dr. Niles' most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0439).

Where did Dr. Gabriel Stephan Niles go to medical school?

Dr. Niles graduated from Keck School of Medicine of USC in 2005.

What drugs does Dr. Gabriel Stephan Niles prescribe most?

In 2024 Medicare Part D data, Dr. Niles' most prescribed drugs by claims were Losartan Potassium, Amlodipine Besylate and Atorvastatin Calcium.

Has Dr. Gabriel Stephan Niles received payments from drug or device companies?

CMS Open Payments shows $3,841 in general payments to Dr. Niles from 37 companies from 2016 to 2025. The largest total came from Abbvie Inc.

How long has Dr. Gabriel Stephan Niles been practicing?

Dr. Niles graduated from medical school in 2005, 21 years ago.

What insurance does Dr. Gabriel Stephan Niles accept?

Dr. Niles is in network with 10 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

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