Dr. Andrea Portocarrero Castillo, MD

  • Stanford, CA
  • Gastroenterologist
NPI1174978852PAC ID6608156898
Medicare services, 2024
487
Medicare patients, 2024
326
Part D claims, 2024
637
MIPS score, 2024
89
Hospital affiliations
3
Practice address
300 Pasteur Drive, Stanford, CA 94305
Practice phone
Call (650) 723-4000
Professional email
Get professional email
Personal email
Get personal email
Mobile number
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Social profiles

Primary practice

Stanford Hospital at 300 Pasteur Drive

Hospital · Stanford, California

See all 6 affiliations

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Dr. Andrea Portocarrero Castillo is a gastroenterologist in Stanford, California

Dr. Portocarrero Castillo practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Dr. Portocarrero Castillo's NPI, 1174978852, was assigned on April 29, 2016. Dr. Portocarrero Castillo graduated from Cayetano Heredia University in 2013. Dr. Portocarrero Castillo holds California license A181751.

NPI and contact details
Medicare PAC ID
6608156898
NPI enumeration date
April 29, 2016
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(650) 723-4000
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Female
Estimated age
38
Medical school graduation
2013

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

Dr. Andrea Portocarrero Castillo practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California

Dr. Portocarrero Castillo's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Source: Dmand AI Affiliation Data

Dr. Andrea Portocarrero Castillo is affiliated with 4 sites of care and 2 medical groups

Dr. Portocarrero Castillo's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dr. Portocarrero Castillo is also affiliated with Mission Regional Medical Center. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Portocarrero Castillo to 1 more hospital, 1 group practice or clinic and 1 medical group, each named with a free account. Dr. Portocarrero Castillo's employer is on file too: a hospital.

See all 6 affiliations for Dr. Portocarrero Castillo

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Andrea Portocarrero Castillo's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Portocarrero Castillo practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Stanford Hospital at 300 Pasteur DriveAvailable with a free account
+3 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Andrea Portocarrero Castillo is one of 1,977 gastroenterologists in California

Gastroenterology is Dr. Portocarrero Castillo's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Portocarrero Castillo is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Portocarrero Castillo's licenses on file in 2 states: California and Ohio.

Specialties and state licenses

  • Gastroenterology, CaliforniaPrimaryLicense A181751 · 2022 to 2026 · taxonomy 207RG0100X
  • Ohio license2016 to 2023

Clinical focus

Dmand AI lists acid reflux, acute gastroduodenitis, cirrhosis of the liver, colonoscopy, electrolyte disorders, gastroenteritis, gastrointestinal bleeding and intestinal diverticulosis among the conditions Dr. Portocarrero Castillo treats.

Gastroenterologists near Dr. Portocarrero Castillo

Counts of gastroenterologists 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. Andrea Portocarrero Castillo billed Medicare for 487 services in 2024

CMS data shows 487 Medicare services from Dr. Portocarrero Castillo across 12 procedure codes in 2024, for 326 Medicare patients. Medicare paid $59,341 for them.

Medicare services, 2024487
Medicare patients326
Paid by Medicare$59,341
Procedure codes12

Dr. Portocarrero Castillo's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 3042024: 33310%
Surgery
2023: 1002024: 919%
Other services
2023: 622024: 5118%
Tests and treatments
2023: 02024: 12

Where Dr. Portocarrero Castillo's Medicare services took place, 2024

  • In an office46495%
  • In a facility235%

Dr. Portocarrero Castillo compared with the California median for gastroenterologists, 2024

  • Dr. Portocarrero Castillo
  • California median
Medicare services
487vs 58617% below
Medicare patients
326vs 3028% above
Part D claims
556vs 38046% above

Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.

Dr. Portocarrero Castillo's 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. Portocarrero Castillo

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

Dr. Andrea Portocarrero Castillo treated 326 Medicare patients in 2024, average age 72

CMS counts 326 Medicare patients who saw Dr. Portocarrero Castillo in 2024. The largest group is 65 to 74, with 133 patients. 71% of them have high cholesterol, and 66% have high blood pressure. 36% are also on Medicaid. Their average risk score is 1.60, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Portocarrero Castillo's median patient age at 54, with 71% women.

Medicare patients, 2024326
Average age72
Average risk score1.60
Also on Medicaid36%

Dr. Portocarrero Castillo's Medicare patients by age, 2024

Dr. Portocarrero Castillo's Medicare patients by sex, 2024

  • Women20061%
  • Men12639%

Chronic conditions among Dr. Portocarrero Castillo's Medicare patients, 2024

  1. High cholesterol71%
  2. High blood pressure66%
  3. Arthritis42%
  4. Anxiety29%
  5. Diabetes29%
  6. Ischemic heart disease29%
  7. Mood disorders29%
  8. Osteoporosis26%

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

Dr. Portocarrero Castillo's 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

  • Women71%
  • Men27%

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

Dr. Andrea Portocarrero Castillo wrote 637 Medicare Part D claims in 2024

In 2024, Dr. Portocarrero Castillo wrote 637 Medicare Part D claims for 214 patients. 63% of them were for generic drugs. CMS names the drug for 556 of them, across 13 drugs with 11 or more claims each, at $167,203 in total drug cost. In 2023, CMS named 216 claims across 7 drugs.

Part D claims, 2024637
Drugs named by CMS13
Total drug cost$167,203
Part D patients214

Dr. Portocarrero Castillo's Part D claims by kind of drug, 2024

  • Generic404 claims63%
  • Brand-name233 claims37%

Dr. Portocarrero Castillo's 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. Portocarrero Castillo's Part D claims, 2024

  • Antibiotics2%14 of 637 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: 2162024: 556157%

Drugs named by CMS: 13 in 2024, 7 in 2023.

See all prescribing by Dr. Portocarrero Castillo

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. Andrea Portocarrero Castillo scored 89 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Portocarrero Castillo for performance year 2024, reported as part of a group. Dr. Portocarrero Castillo accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 18 procedures of colonoscopy by Dr. Portocarrero Castillo, more than 46% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes

Dr. Portocarrero Castillo's MIPS scores, performance year 2024

  • 89of 100Final score
  • 87.1of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 70of 100Cost

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

Where Dr. Portocarrero Castillo ranks in Medicare procedure volume

Colonoscopy
46th percentile18 procedures
Upper gastrointestinal (GI) endoscopy for acid reflux
46th percentile15 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

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

For MedTech and pharma teams

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Dr. Andrea Portocarrero Castillo received $49 in industry payments in 2023

CMS Open Payments shows 2 general payments to Dr. Portocarrero Castillo from 1 drug or device company in 2023. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $49.

Companies that paid Dr. Portocarrero Castillo the most, 2023 to 2023

Share is of all general payments to this clinician.

See all payments to Dr. Portocarrero Castillo

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

Dr. Andrea Portocarrero Castillo graduated from Cayetano Heredia University

Dr. Portocarrero Castillo graduated from Cayetano Heredia University in 2013.

  1. Medical schoolCayetano Heredia University
  2. Board certified in gastroenterologyAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Andrea Portocarrero Castillo accepts plans from 7 insurance carriers

Dr. Portocarrero Castillo is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • United Healthcare
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare

Plan types Dr. Portocarrero Castillo accepts, by number of carriers

  1. Medicare4
  2. PPO4
  3. HMO3
  4. POS3
  5. EPO2

Source: Dmand AI Insurance Network Data

Sources for Dr. Andrea Portocarrero Castillo'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 DataDmand AI Org Hierarchy 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)Doctors and Clinicians Utilization Data (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. Andrea Portocarrero Castillo

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. Andrea Portocarrero Castillo's NPI number?

Dr. Andrea Portocarrero Castillo's NPI number is 1174978852. It was assigned on April 29, 2016, and it is active in the NPI Registry.

What kind of doctor is Dr. Andrea Portocarrero Castillo?

Dr. Andrea Portocarrero Castillo is a gastroenterologist in Stanford, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Dr. Andrea Portocarrero Castillo practice?

Dr. Portocarrero Castillo practices at 300 Pasteur Drive, Stanford, CA 94305. Dr. Portocarrero Castillo's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Dr. Portocarrero Castillo to 1 hospital, 1 group practice or clinic and 1 medical group.

What is Dr. Andrea Portocarrero Castillo's office phone number?

The practice phone on file for Dr. Portocarrero Castillo is (650) 723-4000.

What is Dr. Andrea Portocarrero Castillo's medical license number?

Dr. Portocarrero Castillo holds California license A181751, one of the licenses on file in 2 states.

Which states has Dr. Andrea Portocarrero Castillo been licensed in?

Dmand AI has state licenses on file for Dr. Portocarrero Castillo in California (2022 to 2026) and Ohio (2016 to 2023).

Which hospitals is Dr. Andrea Portocarrero Castillo affiliated with?

Dr. Portocarrero Castillo practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Dr. Portocarrero Castillo is also affiliated with Mission Regional Medical Center. Dmand AI links Dr. Portocarrero Castillo to 1 more hospital.

What medical group is Dr. Andrea Portocarrero Castillo part of?

Dr. Portocarrero Castillo is linked to Stanford Health Care. Dmand AI links Dr. Portocarrero Castillo to 1 more medical group.

Does Dr. Andrea Portocarrero Castillo accept Medicare?

Yes. CMS data shows Dr. Portocarrero Castillo billed Medicare for 487 services in 2024, and Dr. Portocarrero Castillo accepts Medicare assignment.

What is Dr. Andrea Portocarrero Castillo's MIPS score?

Dr. Portocarrero Castillo's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.

Show 8 more questionsShow fewer questions

How many Medicare patients does Dr. Andrea Portocarrero Castillo see?

CMS counts 326 Medicare patients who saw Dr. Portocarrero Castillo in 2024, with an average age of 72.

Is Dr. Andrea Portocarrero Castillo board certified?

Yes. Dr. Portocarrero Castillo is board certified in gastroenterology by the American Board of Internal Medicine.

What services does Dr. Andrea Portocarrero Castillo bill to Medicare?

In 2024, Dr. Portocarrero Castillo's most billed Medicare services were office visit, established patient (99215), office visit, new patient (99205) and office visit, established patient (99214).

Where did Dr. Andrea Portocarrero Castillo go to medical school?

Dr. Portocarrero Castillo graduated from Cayetano Heredia University in 2013.

What drugs does Dr. Andrea Portocarrero Castillo prescribe most?

In 2024 Medicare Part D data, Dr. Portocarrero Castillo's most prescribed drugs by claims were Linzess, Omeprazole and Famotidine.

Has Dr. Andrea Portocarrero Castillo received payments from drug or device companies?

CMS Open Payments shows $49 in general payments to Dr. Portocarrero Castillo from 1 company from 2023 to 2023. The largest total came from Merck Sharp & Dohme Corporation.

How long has Dr. Andrea Portocarrero Castillo been practicing?

Dr. Portocarrero Castillo graduated from medical school in 2013, 13 years ago.

What insurance does Dr. Andrea Portocarrero Castillo accept?

Dr. Portocarrero Castillo is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.

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