Dr. Gregory Mark Enns, MD

  • Palo Alto, CA
  • Medical biochemical genetics
NPI1508961897PAC ID0446147490
Medicare patients, 2024
13
Part D claims, 2016
33
Publications
119
Clinical trials
7
MIPS score, 2024
84
Practice address
725 Welch Road, Palo Alto, CA 94304
Practice phone
Call (650) 497-8000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Lucile Packard Children's Hospital Stanford

Hospital · Palo Alto, California

See all 4 affiliations

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Dr. Gregory Mark Enns is a medical biochemical genetics in Palo Alto, California

Dr. Enns practices at Lucile Packard Children's Hospital Stanford in Palo Alto, California, part of Stanford University.

Dr. Enns' NPI, 1508961897, was assigned on September 13, 2006. Dr. Enns graduated from University of Glasgow Faculty of Medicine in 1990. Dr. Enns holds California license A52095.

NPI and contact details
Medicare PAC ID
0446147490
NPI enumeration date
September 13, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(650) 497-8000
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
62
Medical school graduation
1990

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

Dr. Gregory Mark Enns practices at Lucile Packard Children's Hospital Stanford in Palo Alto, California

Dr. Enns' primary practice is Lucile Packard Children's Hospital Stanford, at 725 Welch Road, Palo Alto, CA 94304 in Santa Clara County. The practice phone is (650) 497-8000.

Source: Dmand AI Affiliation Data

Dr. Gregory Mark Enns is affiliated with 1 site of care and 3 medical groups

Dr. Enns' primary practice is Lucile Packard Children's Hospital Stanford in Palo Alto, California, part of Stanford University. The medical group on file is Lucile Packard Children's Hospital Stanford. Dmand AI also links Dr. Enns to 2 more medical groups, each named with a free account. Dr. Enns' employer is on file too: a hospital.

See all 4 affiliations for Dr. Enns

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

Dmand AI tracks the EHR system at Dr. Gregory Mark Enns' practice

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

EHR by site
SiteEHR vendor and product
Lucile Packard Children's Hospital StanfordAvailable with a free account
+2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Gregory Mark Enns is one of 5 medical biochemical genetics in California

Medical biochemical genetics is Dr. Enns' primary specialty in the NPI Registry, under taxonomy code 207SG0207X. Dr. Enns is board certified in clinical biochemical genetics by the American Board of Medical Genetics and Genomics. Dmand AI has Dr. Enns' licenses on file in 4 states: California, Oregon, Hawaii and Florida.

Specialties and state licenses

  • Medical biochemical genetics, CaliforniaPrimaryLicense A52095 · 1993 to 2027 · taxonomy 207SG0207X
  • Oregon licenseSince 2011
  • Hawaii licenseLicense MD-12592 · 2003 to 2026
  • Florida license2012 to 2020

Medical biochemical genetics near Dr. Enns

Counts of medical biochemical genetics with a Dmand AI profile, by place and practice. Each opens the list.

5medical biochemical genetics in California
3medical biochemical genetics in Palo Alto
3medical biochemical genetics at Lucile Packard Children's Hospital Stanford

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

Dr. Gregory Mark Enns treated 13 Medicare patients in 2024, average age 63

CMS counts 13 Medicare patients who saw Dr. Enns in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 1.20, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Enns' median patient age at 13, with 55% women.

Medicare patients, 202413
Average age63
Average risk score1.20

Dr. Enns' Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Enns' patients across all payers

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

Patient panel by age, all payers

Median age 13

Patient panel by sex, all payers

  • Women55%
  • Men45%

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

Dr. Gregory Mark Enns wrote 33 Medicare Part D claims in 2016

In 2016, Dr. Enns wrote 33 Medicare Part D claims. They cover 1 drug, with $2,827,732 in total drug cost.

Part D claims, 201633
Drugs named by CMS1
Total drug cost$2.8M

Dr. Enns' most prescribed drugs by claims, 2016

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

See all prescribing by Dr. Enns

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

Dr. Gregory Mark Enns scored 84 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Enns for performance year 2024, reported as part of a group. Dr. Enns accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Enns as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Enns' MIPS scores, performance year 2024

  • 84of 100Final score
  • 74.5of 100Quality
  • 97of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 73of 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. Gregory Mark Enns has 119 publications on record

Dmand AI links 119 papers to Dr. Enns, published from 2005 to 2025. 2016 was the busiest year, with 8. The most frequent topics are Mitochondrial Diseases, Amino Acid Metabolism, Inborn Errors and Phenotype. Dr. Enns has published most often in Mol Genet Metab. Dr. Enns' most frequent co-authors are Fernando Scaglia, MD, Anna-Kaisa Niemi, MD, PhD and Bruce Howard Cohen, MD.

Papers119
Years published2005 to 2025

Dr. Enns' papers by year, 2016 to 2025

Topics Dr. Enns writes about most

  • Mitochondrial Diseases
  • Amino Acid Metabolism, Inborn Errors
  • Phenotype
  • Neonatal Screening
  • Liver Transplantation
  • Mitochondria
  • Fibroblasts
  • Genetic Testing

Dr. Enns' most frequent co-authors

Recent publications by Dr. Enns

See all 119 publications and co-authors

See who Dr. Enns researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Enns works with, so you can find a warm path to the right medical biochemical genetics.

How network discovery works

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

Dr. Gregory Mark Enns has worked on 7 clinical trials

Dmand AI links Dr. Enns to 7 clinical trials, 4 of them phase 2 studies. 1 is still active or recruiting. Conditions studied include Leigh Disease, Methylmalonic acidemia and Carbamoyl-Phosphate Synthase I Deficiency Disease. Mendel Tuchman sponsors the most, 2.

Conditions in Dr. Enns' trials

  • Leigh Disease
  • Methylmalonic acidemia
  • Carbamoyl-Phosphate Synthase I Deficiency Disease
  • Cytochrome-c Oxidase Deficiency
  • Ophthalmoplegia, Chronic Progressive External

Investigators on the most trials with Dr. Enns

Recent clinical trials with Dr. Enns

See all 7 clinical trials and co-investigators

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Gregory Mark Enns received $124,866 in industry payments from 2016 to 2025

CMS Open Payments shows 136 general payments to Dr. Enns from 14 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 73% of the total. Travere Therapeutics, Inc. paid the most, $36,039.

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

General payments to Dr. Enns by kind, 2016 to 2025

$124.9Kin total
  • Consulting fees$91,27073%
  • Honoraria$28,06922%
  • Travel and lodging$4,2293%
  • Food and beverage$1,1161%
  • Education$1820%

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

Share is of all general payments to this clinician.

See all payments to Dr. Enns

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

Dr. Gregory Mark Enns has 2 awards and honors on record

Dmand AI lists 2 awards for Dr. Enns, most recently Regional Top Doctor in 2014.

Awards and honors for Dr. Enns

  1. 2014
    • Regional Top Doctor
  2. Undated
    • AAP Fellow

Source: Dmand AI Professional Profile Data

Dr. Gregory Mark Enns graduated from University of Glasgow Faculty of Medicine

Dr. Enns graduated from University of Glasgow Faculty of Medicine in 1990. Dr. Enns is a member of AAP.

  1. Medical schoolUniversity of Glasgow Faculty of Medicine
  2. Board certified in clinical biochemical geneticsAmerican Board of Medical Genetics and Genomics
  3. Board certified in clinical genetics and genomicsAmerican Board of Medical Genetics and Genomics

Source: Dmand AI Professional Profile Data

Dr. Gregory Mark Enns accepts plans from 16 insurance carriers

Dr. Enns is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Elevance
  • United Healthcare
  • HCSC
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • Alliant Health Plans
  • +8 more carriersWith a free account

Plan types Dr. Enns accepts, by number of carriers

  1. PPO10
  2. Medicare7
  3. HMO6
  4. POS5
  5. EPO4
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Gregory Mark Enns'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 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)
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)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
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. Gregory Mark Enns

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. Gregory Mark Enns' NPI number?

Dr. Gregory Mark Enns' NPI number is 1508961897. It was assigned on September 13, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Gregory Mark Enns?

Dr. Gregory Mark Enns is a medical biochemical genetics in Palo Alto, California. The primary specialty in the NPI Registry is Medical Biochemical Genetics (taxonomy code 207SG0207X).

Where does Dr. Gregory Mark Enns practice?

Dr. Enns practices at 725 Welch Road, Palo Alto, CA 94304. Dr. Enns' primary practice is Lucile Packard Children's Hospital Stanford in Palo Alto, California, part of Stanford University. Dmand AI also links Dr. Enns to 2 medical groups.

What is Dr. Gregory Mark Enns' office phone number?

The practice phone on file for Dr. Enns is (650) 497-8000.

What is Dr. Gregory Mark Enns' medical license number?

Dr. Enns holds California license A52095, one of the licenses on file in 4 states.

Which states has Dr. Gregory Mark Enns been licensed in?

Dmand AI has state licenses on file for Dr. Enns in California (1993 to 2027), Oregon (since 2011), Hawaii (2003 to 2026) and Florida (2012 to 2020).

Which hospitals is Dr. Gregory Mark Enns affiliated with?

Dr. Enns practices at Lucile Packard Children's Hospital Stanford in Palo Alto, California.

What medical group is Dr. Gregory Mark Enns part of?

Dr. Enns is linked to Lucile Packard Children's Hospital Stanford. Dmand AI links Dr. Enns to 2 more medical groups.

Does Dr. Gregory Mark Enns accept Medicare?

Yes. CMS lists Dr. Enns as accepting Medicare assignment.

Does Dr. Gregory Mark Enns offer telehealth?

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

Show 10 more questionsShow fewer questions

What is Dr. Gregory Mark Enns' MIPS score?

Dr. Enns' MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.

How many Medicare patients does Dr. Gregory Mark Enns see?

CMS counts 13 Medicare patients who saw Dr. Enns in 2024, with an average age of 63.

Is Dr. Gregory Mark Enns board certified?

Yes. Dr. Enns is board certified in clinical biochemical genetics by the American Board of Medical Genetics and Genomics.

Where did Dr. Gregory Mark Enns go to medical school?

Dr. Enns graduated from University of Glasgow Faculty of Medicine in 1990.

What drugs does Dr. Gregory Mark Enns prescribe most?

In 2016 Medicare Part D data, Dr. Enns' most prescribed drugs by claims were Ravicti.

Has Dr. Gregory Mark Enns received payments from drug or device companies?

CMS Open Payments shows $124,866 in general payments to Dr. Enns from 14 companies from 2016 to 2025. The largest total came from Travere Therapeutics, Inc.

How long has Dr. Gregory Mark Enns been practicing?

Dr. Enns graduated from medical school in 1990, 36 years ago.

Does Dr. Gregory Mark Enns do research?

Dmand AI links 119 publications to Dr. Enns, published from 2005 to 2025. Dr. Enns has worked on 7 clinical trials.

Who does Dr. Gregory Mark Enns publish with?

Dr. Enns' most frequent co-authors are Fernando Scaglia, MD (8 shared papers), Anna-Kaisa Niemi, MD, PhD (7 shared papers) and Bruce Howard Cohen, MD (6 shared papers).

What insurance does Dr. Gregory Mark Enns accept?

Dr. Enns is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

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