Dr. Lindsey Merrihew Haddock, MD

  • Stanford, CA
  • Internist
NPI1144616590PAC ID2264762996
Medicare services, 2024
621
Medicare patients, 2024
218
Part D claims, 2024
2,375
Publications
6
Hospital affiliations
3
Practice address
300 Pasteur Drive, Stanford, CA 94305
Practice phone
Call (650) 723-4000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Stanford Hospital at 300 Pasteur Drive

Hospital · Stanford, California

See all 13 affiliations

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Dr. Lindsey Merrihew Haddock is an internist in Stanford, California

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

Dr. Haddock's NPI, 1144616590, was assigned on April 13, 2015. Dr. Haddock graduated from Stanford University School Of Medicine in 2015. Dr. Haddock's California license number on file is A156235.

NPI and contact details
Medicare PAC ID
2264762996
NPI enumeration date
April 13, 2015
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(650) 723-4000
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Female
Estimated age
37
Medical school graduation
2015

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

Dr. Lindsey Merrihew Haddock practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California

Dr. Haddock'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. Lindsey Merrihew Haddock is affiliated with 8 sites of care and 5 medical groups

Dr. Haddock's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dr. Haddock is also affiliated with El Camino Health - Mountain View Hospital. The medical group on file is UCSF Medical Group. Dmand AI also links Dr. Haddock to 1 more hospital, 5 home health agencies and 4 medical groups, each named with a free account. Dr. Haddock's employer is on file too: a hospital.

See all 13 affiliations for Dr. Haddock

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

Dmand AI tracks the EHR system at Dr. Lindsey Merrihew Haddock's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Haddock practices, 8 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
+7 more sites and 4 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Lindsey Merrihew Haddock is one of 16,751 internists in California

Internal medicine is Dr. Haddock's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Haddock is board certified in geriatric medicine by the American Board of Internal Medicine. Dmand AI has Dr. Haddock's licenses on file in 2 states: California and Pennsylvania.

Specialties and state licenses

  • Internal medicine, CaliforniaPrimaryLicense A156235 · 2018 to 2025 · taxonomy 207R00000X
  • Pennsylvania license2015 to 2018

Clinical focus

Dmand AI lists acid reflux, alzheimer's disease, anxiety, aortic atherosclerois, asthma, atrial fibrillation and flutter, benign or precancerous skin growths and cardiomyopathy among the conditions Dr. Haddock treats.

Internists near Dr. Haddock

Counts of internists 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. Lindsey Merrihew Haddock billed Medicare for 621 services in 2024

CMS data shows 621 Medicare services from Dr. Haddock across 9 procedure codes in 2024, for 218 Medicare patients. Medicare paid $46,004 for them.

Medicare services, 2024621
Medicare patients218
Paid by Medicare$46,004
Procedure codes9

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

  • 2023
  • 2024
Office and hospital visits
2023: 3862024: 3942%
Other services
2023: 1972024: 22715%

Where Dr. Haddock's Medicare services took place, 2024

  • In an office13522%
  • In a facility48678%

Dr. Haddock compared with the California median for internists, 2024

  • Dr. Haddock
  • California median
Medicare services
621vs 36172% above
Medicare patients
218vs 15144% above
Part D claims
1,949vs 4214.6 times

Medians across 15,815 internists in California with Dmand AI profiles that report each measure.

Dr. Haddock'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. Haddock

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

Dr. Lindsey Merrihew Haddock treated 218 Medicare patients in 2024, average age 86

CMS counts 218 Medicare patients who saw Dr. Haddock in 2024. The largest group is 85 and over, with 129 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 1.98, 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. Haddock's median patient age at 88, with 62% women.

Medicare patients, 2024218
Average age86
Average risk score1.98
Also on Medicaid18%

Dr. Haddock's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Haddock's Medicare patients by sex, 2024

  • Women13562%
  • Men8338%

Chronic conditions among Dr. Haddock's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Osteoporosis52%
  4. Arthritis46%
  5. Alzheimer's and dementia43%
  6. Atrial fibrillation39%
  7. Chronic kidney disease39%
  8. Ischemic heart disease39%

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

Dr. Haddock's patients across all payers

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

Patient panel by age, all payers

Median age 88

Patient panel by sex, all payers

  • Women62%
  • Men38%

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

Dr. Lindsey Merrihew Haddock wrote 2,375 Medicare Part D claims in 2024

In 2024, Dr. Haddock wrote 2,375 Medicare Part D claims for 189 patients. 85% of them were for generic drugs. CMS names the drug for 1,949 of them, across 58 drugs with 11 or more claims each, at $169,119 in total drug cost. In 2023, CMS named 1,138 claims across 34 drugs.

Part D claims, 20242,375
Drugs named by CMS58
Total drug cost$169,119
Part D patients189

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

  • Generic2,019 claims85%
  • Brand-name and other356 claims15%

Dr. Haddock'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. Haddock's Part D claims, 2024

  • Opioids1%18 of 2,375 claims
  • Antibiotics3%61 of 2,375 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: 1,1382024: 1,94971%

Drugs named by CMS: 58 in 2024, 34 in 2023.

See all prescribing by Dr. Haddock

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. Lindsey Merrihew Haddock offers telehealth to Medicare patients

Dr. Haddock accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Haddock as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Lindsey Merrihew Haddock has 6 publications on record

Dmand AI links 6 papers to Dr. Haddock, published from 2020 to 2024. 2020 was the busiest year, with 2. The most frequent topics are Learning, Clinical Competence and Internship and Residency. Dr. Haddock's most frequent co-authors are Josette Ann Rivera, MD, Deepa Rani Nandiwada, MD and Sara N. Sani, MD.

Papers6
Years published2020 to 2024

Dr. Haddock's papers by year, 2020 to 2024

Topics Dr. Haddock writes about most

  • Learning
  • Clinical Competence
  • Internship and Residency
  • Workplace

Dr. Haddock's most frequent co-authors

Recent publications by Dr. Haddock

See all 6 publications and co-authors

See who Dr. Haddock researches with

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

How network discovery works

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

Dr. Lindsey Merrihew Haddock graduated from Stanford University School Of Medicine

Dr. Haddock graduated from Stanford University School Of Medicine in 2015.

  1. Medical schoolStanford University School Of Medicine
  2. Board certified in geriatric medicineAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Lindsey Merrihew Haddock accepts plans from 8 insurance carriers

Dr. Haddock is in network with 8 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
  • HCSC
  • Regence Health Plans
  • United Healthcare
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare

Plan types Dr. Haddock accepts, by number of carriers

  1. Medicare6
  2. PPO5
  3. HMO3
  4. POS3
  5. EPO2

Source: Dmand AI Insurance Network Data

Sources for Dr. Lindsey Merrihew Haddock'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)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
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. Lindsey Merrihew Haddock

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. Lindsey Merrihew Haddock's NPI number?

Dr. Lindsey Merrihew Haddock's NPI number is 1144616590. It was assigned on April 13, 2015, and it is active in the NPI Registry.

What kind of doctor is Dr. Lindsey Merrihew Haddock?

Dr. Lindsey Merrihew Haddock is an internist in Stanford, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).

Where does Dr. Lindsey Merrihew Haddock practice?

Dr. Haddock practices at 300 Pasteur Drive, Stanford, CA 94305. Dr. Haddock's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Dr. Haddock to 1 hospital, 5 home health agencies and 4 medical groups.

What is Dr. Lindsey Merrihew Haddock's office phone number?

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

What is Dr. Lindsey Merrihew Haddock's medical license number?

Dr. Haddock's California license number on file is A156235, one of the licenses on file in 2 states.

Which states has Dr. Lindsey Merrihew Haddock been licensed in?

Dmand AI has state licenses on file for Dr. Haddock in California (2018 to 2025) and Pennsylvania (2015 to 2018).

Which hospitals is Dr. Lindsey Merrihew Haddock affiliated with?

Dr. Haddock practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Dr. Haddock is also affiliated with El Camino Health - Mountain View Hospital. Dmand AI links Dr. Haddock to 1 more hospital.

What medical group is Dr. Lindsey Merrihew Haddock part of?

Dr. Haddock is linked to UCSF Medical Group. Dmand AI links Dr. Haddock to 4 more medical groups.

Does Dr. Lindsey Merrihew Haddock accept Medicare?

Yes. CMS data shows Dr. Haddock billed Medicare for 621 services in 2024, and Dr. Haddock accepts Medicare assignment.

Does Dr. Lindsey Merrihew Haddock offer telehealth?

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

Show 9 more questionsShow fewer questions

How many Medicare patients does Dr. Lindsey Merrihew Haddock see?

CMS counts 218 Medicare patients who saw Dr. Haddock in 2024, with an average age of 86.

Is Dr. Lindsey Merrihew Haddock board certified?

Yes. Dr. Haddock is board certified in geriatric medicine by the American Board of Internal Medicine.

What services does Dr. Lindsey Merrihew Haddock bill to Medicare?

In 2024, Dr. Haddock's most billed Medicare services were office visit, established patient (99215), medicare service (G2211) and office visit, established patient (99214).

Where did Dr. Lindsey Merrihew Haddock go to medical school?

Dr. Haddock graduated from Stanford University School Of Medicine in 2015.

What drugs does Dr. Lindsey Merrihew Haddock prescribe most?

In 2024 Medicare Part D data, Dr. Haddock's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Eliquis.

How long has Dr. Lindsey Merrihew Haddock been practicing?

Dr. Haddock graduated from medical school in 2015, 11 years ago.

Does Dr. Lindsey Merrihew Haddock do research?

Dmand AI links 6 publications to Dr. Haddock, published from 2020 to 2024.

Who does Dr. Lindsey Merrihew Haddock publish with?

Dr. Haddock's most frequent co-authors are Josette Ann Rivera, MD (2 shared papers), Deepa Rani Nandiwada, MD (1 shared paper) and Sara N. Sani, MD (1 shared paper).

What insurance does Dr. Lindsey Merrihew Haddock accept?

Dr. Haddock is in network with 8 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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