Harleen Grewal

  • Valencia, CA
  • Emergency medicine physician
NPI1124551593
Medicare services, 2024
424
Medicare patients, 2024
319
Part D claims, 2024
186
Publications
4
Hospital affiliations
1
Practice address
23845 McBean Pkwy, Valencia, CA 91355
Practice phone
Call (661) 253-8000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Henry Mayo Newhall Hospital

Hospital · Valencia, California

See all 16 affiliations

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Harleen Grewal is an emergency medicine physician in Valencia, California

Harleen Grewal practices at Henry Mayo Newhall Hospital in Valencia, California, part of Henry Mayo Newhall Hospital.

Harleen Grewal's NPI, 1124551593, was assigned on April 4, 2017. Harleen Grewal graduated from WashU Medicine in 2017. Harleen Grewal holds California license A157685.

NPI and contact details
NPI enumeration date
April 4, 2017
NPI status
Active
Practice phone
(661) 253-8000
Professional email
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Personal email
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Mobile number
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Sex
Female
Estimated age
35
Medical school graduation
2017

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

Harleen Grewal practices at Henry Mayo Newhall Hospital in Valencia, California

Harleen Grewal's primary practice is Henry Mayo Newhall Hospital, at 23845 McBean Pkwy, Valencia, CA 91355 in Los Angeles County. The practice phone is (661) 253-8000.

Source: Dmand AI Affiliation Data

Harleen Grewal is affiliated with 8 sites of care and 8 medical groups

Harleen Grewal's primary practice is Henry Mayo Newhall Hospital in Valencia, California, part of Henry Mayo Newhall Hospital. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Harleen Grewal to 7 more group practices and clinics and 7 medical groups, each named with a free account.

See all 16 affiliations for Harleen Grewal

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

Dmand AI tracks the EHR system at Harleen Grewal's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Harleen Grewal practices, 8 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Henry Mayo Newhall HospitalAvailable with a free account
+7 more sites and 7 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dmand AI maps EHR vendors, IT decision makers and buying committees across Henry Mayo Newhall Hospital and 6.2K+ hospitals, with verified contacts in the same login.

Harleen Grewal is one of 7,423 emergency medicine physicians in California

Emergency medicine is Harleen Grewal's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Harleen Grewal is board certified in emergency medicine by the American Board of Emergency Medicine. Harleen Grewal is licensed in California.

Specialties and state licenses

  • Emergency medicine, CaliforniaPrimaryLicense A157685 · 2018 to 2026 · taxonomy 207P00000X

Emergency medicine physicians near Harleen Grewal

Counts of emergency 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

Harleen Grewal billed Medicare for 424 services in 2024

CMS data shows 424 Medicare services from Harleen Grewal across 4 procedure codes in 2024, for 319 Medicare patients. Medicare paid $42,951 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024424
Medicare patients319
Paid by Medicare$42,951
Procedure codes4

Harleen Grewal's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 3562024: 3259%
Tests and treatments
2023: 1332024: 9926%

Harleen Grewal compared with the California median for emergency medicine physicians, 2024

  • Harleen Grewal
  • California median
Medicare services
424vs 26560% above
Medicare patients
319vs 24331% above
Part D claims
88vs 6242% above

Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.

Harleen Grewal'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 Harleen Grewal

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

Harleen Grewal treated 319 Medicare patients in 2024, average age 75

CMS counts 319 Medicare patients who saw Harleen Grewal in 2024. The largest group is 75 to 84, with 113 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 39% are also on Medicaid. Their average risk score is 2.20, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Harleen Grewal's median patient age at 48, with 59% women.

Medicare patients, 2024319
Average age75
Average risk score2.20
Also on Medicaid39%

Harleen Grewal's Medicare patients by age, 2024

Harleen Grewal's Medicare patients by sex, 2024

  • Women18558%
  • Men13442%

Chronic conditions among Harleen Grewal's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis61%
  4. Diabetes45%
  5. Mood disorders44%
  6. Depression40%
  7. Ischemic heart disease39%
  8. Anxiety38%

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

Harleen Grewal's patients across all payers

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

Patient panel by age, all payers

Median age 48

Patient panel by sex, all payers

  • Women59%
  • Men41%

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

Harleen Grewal wrote 186 Medicare Part D claims in 2024

In 2024, Harleen Grewal wrote 186 Medicare Part D claims for 133 patients. 96% of them were for generic drugs. CMS names the drug for 88 of them, across 5 drugs with 11 or more claims each, at $534 in total drug cost. In 2023, CMS named 112 claims across 7 drugs.

Part D claims, 2024186
Drugs named by CMS5
Total drug cost$534
Part D patients133

Harleen Grewal's Part D claims by kind of drug, 2024

  • Generic178 claims96%
  • Brand-name and other8 claims4%

Harleen Grewal'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 Harleen Grewal's Part D claims, 2024

  • Opioids12%22 of 186 claims
  • Antibiotics34%64 of 186 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: 1122024: 8821%

Drugs named by CMS: 5 in 2024, 7 in 2023.

See all prescribing by Harleen Grewal

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

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Harleen Grewal has 4 publications on record

Dmand AI links 4 papers to Harleen Grewal, published from 2010 to 2022. The most frequent topics are Tuberculosis, Pulmonary.

Papers4
Years published2010 to 2022

Harleen Grewal's papers by year, 2010 to 2022

Topics Harleen Grewal writes about most

  • Tuberculosis, Pulmonary

Recent publications by Harleen Grewal

See all 4 publications and co-authors

See who Harleen Grewal researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Harleen Grewal works with, so you can find a warm path to the right emergency medicine physicians.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Harleen Grewal received $244 in industry payments from 2023 to 2025

CMS Open Payments shows 4 general payments to Harleen Grewal from 3 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Merz North America, Inc. paid the most, $100.

General payments to Harleen Grewal by program year, 2023 to 2025

Companies that paid Harleen Grewal the most, 2023 to 2025

Share is of all general payments to this clinician.

See all payments to Harleen Grewal

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

Harleen Grewal graduated from WashU Medicine

Harleen Grewal graduated from WashU Medicine in 2017.

  1. Medical schoolWashU Medicine
  2. Board certified in emergency medicineAmerican Board of Emergency Medicine

Source: Dmand AI Professional Profile Data

Harleen Grewal accepts plans from 8 insurance carriers

Harleen Grewal is in network with 8 carriers, including United Healthcare, Elevance and Alliant Health Plans. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.

  • United Healthcare
  • Elevance
  • Alliant Health Plans
  • Aspirus Health Plan
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare
  • HCSC
  • Molina

Plan types Harleen Grewal accepts, by number of carriers

  1. HMO3
  2. Medicare3
  3. PPO3
  4. POS2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Harleen Grewal'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)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
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 Harleen Grewal

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

What is Harleen Grewal's NPI number?

Harleen Grewal's NPI number is 1124551593. It was assigned on April 4, 2017, and it is active in the NPI Registry.

What does Harleen Grewal specialize in?

Harleen Grewal is an emergency medicine physician in Valencia, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).

Where does Harleen Grewal practice?

Harleen Grewal practices at 23845 McBean Pkwy, Valencia, CA 91355. Harleen Grewal's primary practice is Henry Mayo Newhall Hospital in Valencia, California, part of Henry Mayo Newhall Hospital. Dmand AI also links Harleen Grewal to 7 group practices and clinics and 7 medical groups.

What is Harleen Grewal's office phone number?

The practice phone on file for Harleen Grewal is (661) 253-8000.

What is Harleen Grewal's medical license number?

Harleen Grewal holds California license A157685.

Which hospitals is Harleen Grewal affiliated with?

Harleen Grewal practices at Henry Mayo Newhall Hospital in Valencia, California.

What medical group is Harleen Grewal part of?

Harleen Grewal is linked to Southern California Permanente Medical Group. Dmand AI links Harleen Grewal to 7 more medical groups.

Does Harleen Grewal accept Medicare?

Yes. CMS data shows Harleen Grewal billed Medicare for 424 services in 2024.

How many Medicare patients does Harleen Grewal see?

CMS counts 319 Medicare patients who saw Harleen Grewal in 2024, with an average age of 75.

Is Harleen Grewal board certified?

Yes. Harleen Grewal is board certified in emergency medicine by the American Board of Emergency Medicine.

Show 7 more questionsShow fewer questions

What services does Harleen Grewal bill to Medicare?

In 2024, Harleen Grewal's most billed Medicare services were emergency department visit (99285), heart test or procedure (93042) and emergency department visit (99284).

Where did Harleen Grewal go to medical school?

Harleen Grewal graduated from WashU Medicine in 2017.

What drugs does Harleen Grewal prescribe most?

In 2024 Medicare Part D data, Harleen Grewal's most prescribed drugs by claims were Cefdinir, Ibuprofen and Hydrocodone-Acetaminophen.

Has Harleen Grewal received payments from drug or device companies?

CMS Open Payments shows $244 in general payments to Harleen Grewal from 3 companies from 2023 to 2025. The largest total came from Merz North America, Inc.

How long has Harleen Grewal been practicing?

Harleen Grewal graduated from medical school in 2017, 9 years ago.

Does Harleen Grewal do research?

Dmand AI links 4 publications to Harleen Grewal, published from 2010 to 2022.

What insurance does Harleen Grewal accept?

Harleen Grewal is in network with 8 carriers, including United Healthcare, Elevance and Alliant Health Plans. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.

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