Dr. Joshua Ruben Damian, MD
- Medicare services, 2024
- 428
- Medicare patients, 2024
- 206
- Part D claims, 2024
- 16
- Hospital affiliations
- 2
- Industry payments
- $1,175
- Practice address
- 3421 West Ninth Street, Waterloo, IA 50702
- Practice phone
- Call (319) 272-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Damian's professional email, personal email and mobile number
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Dr. Joshua Ruben Damian is a general surgeon in Waterloo, Iowa
Dr. Damian practices at MercyOne Waterloo Medical Center in Waterloo, Iowa, part of Trinity Health.
Dr. Damian's NPI, 1689085821, was assigned on May 9, 2014. Dr. Damian graduated from University of Arizona College of Medicine in 2014. Dr. Damian holds Arizona license R74349.
- NPI
- 1689085821NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264796762
- NPI enumeration date
- May 9, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (319) 272-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Joshua Ruben Damian practices at MercyOne Waterloo Medical Center in Waterloo, Iowa
Dr. Damian's primary practice is MercyOne Waterloo Medical Center, at 3421 West Ninth Street, Waterloo, IA 50702 in Black Hawk County. The practice phone is (319) 272-8000.
- MercyOne Waterloo Medical Center3421 West Ninth Street, Waterloo, IA 50702 · Black Hawk CountyPhone(319) 272-8000
Source: Dmand AI Affiliation Data
Dr. Joshua Ruben Damian is affiliated with 3 sites of care and 2 medical groups
Dr. Damian's primary practice is MercyOne Waterloo Medical Center in Waterloo, Iowa, part of Trinity Health. Dr. Damian is also affiliated with MercyOne Cedar Falls Medical Center. The medical group on file is MercyOne Waterloo OB/GYN. Dmand AI also links Dr. Damian to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Joshua Ruben Damian's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Damian practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MercyOne Waterloo Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Joshua Ruben Damian is one of 317 general surgeons in Iowa
Surgery is Dr. Damian's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Damian is licensed in Arizona.
Specialties and state licenses
- Surgery, ArizonaPrimary
General surgeons near Dr. Damian
Counts of general surgeons 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. Joshua Ruben Damian billed Medicare for 428 services in 2024
CMS data shows 428 Medicare services from Dr. Damian across 8 procedure codes in 2024, for 206 Medicare patients. Medicare paid $39,769 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Damian's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3052024: 40232%
- Surgery
- 2023: 02024: 26
Dr. Damian compared with the Iowa median for general surgeons, 2024
- Dr. Damian
- Iowa median
- Medicare services
- 428vs 1642.6 times
- Medicare patients
- 206vs 14641% above
- Part D claims
- 19vs 4356% below
Medians across 332 general surgeons in Iowa with Dmand AI profiles that report each measure.
Dr. Damian'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Damian and other general surgeons in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Joshua Ruben Damian treated 206 Medicare patients in 2024, average age 75
CMS counts 206 Medicare patients who saw Dr. Damian in 2024. The largest group is 75 to 84, with 85 patients. 75% of them have high blood pressure, and 65% have high cholesterol. 32% are also on Medicaid. Their average risk score is 1.80, 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. Damian's median patient age at 51, with 38% women.
Dr. Damian's Medicare patients by age, 2024
Dr. Damian's Medicare patients by sex, 2024
- Women8642%
- Men12058%
Chronic conditions among Dr. Damian's Medicare patients, 2024
- High blood pressure75%
- High cholesterol65%
- Arthritis46%
- Diabetes43%
- Ischemic heart disease29%
- Chronic kidney disease27%
- Stroke or TIA27%
- Heart failure26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Damian's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women38%
- Men61%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Joshua Ruben Damian wrote 16 Medicare Part D claims in 2024
In 2024, Dr. Damian wrote 16 Medicare Part D claims. 94% of them were for generic drugs. They cover 1 drug, with $150 in total drug cost. In 2016, CMS named 13 claims across 1 drug.
Dr. Damian's Part D claims by kind of drug, 2024
- Generic15 claims94%
- Brand-name and other1 claims6%
Dr. Damian's most prescribed drugs by claims, 2017
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 132017: 1946%
Drugs named by CMS: 1 in 2017, 1 in 2016.
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
How Dr. Joshua Ruben Damian takes part in Medicare
Dr. Damian accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Joshua Ruben Damian received $1,175 in industry payments from 2016 to 2024
CMS Open Payments shows 23 general payments to Dr. Damian from 8 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $816.
General payments to Dr. Damian by program year, 2016 to 2024
Companies that paid Dr. Damian the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Joshua Ruben Damian graduated from University of Arizona College of Medicine
Dr. Damian graduated from University of Arizona College of Medicine in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Joshua Ruben Damian's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Joshua Ruben Damian
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. Joshua Ruben Damian's NPI number?
Dr. Joshua Ruben Damian's NPI number is 1689085821. It was assigned on May 9, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Joshua Ruben Damian?
Dr. Joshua Ruben Damian is a general surgeon in Waterloo, Iowa. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Joshua Ruben Damian practice?
Dr. Damian practices at 3421 West Ninth Street, Waterloo, IA 50702. Dr. Damian's primary practice is MercyOne Waterloo Medical Center in Waterloo, Iowa, part of Trinity Health. Dmand AI also links Dr. Damian to 1 group practice or clinic and 1 medical group.
What is Dr. Joshua Ruben Damian's office phone number?
The practice phone on file for Dr. Damian is (319) 272-8000.
What is Dr. Joshua Ruben Damian's medical license number?
Dr. Damian holds Arizona license R74349.
Which hospitals is Dr. Joshua Ruben Damian affiliated with?
Dr. Damian practices at MercyOne Waterloo Medical Center in Waterloo, Iowa. Dr. Damian is also affiliated with MercyOne Cedar Falls Medical Center.
What medical group is Dr. Joshua Ruben Damian part of?
Dr. Damian is linked to MercyOne Waterloo OB/GYN. Dmand AI links Dr. Damian to 1 more medical group.
Does Dr. Joshua Ruben Damian accept Medicare?
Yes. CMS data shows Dr. Damian billed Medicare for 428 services in 2024, and Dr. Damian accepts Medicare assignment.
How many Medicare patients does Dr. Joshua Ruben Damian see?
CMS counts 206 Medicare patients who saw Dr. Damian in 2024, with an average age of 75.
What services does Dr. Joshua Ruben Damian bill to Medicare?
In 2024, Dr. Damian's most billed Medicare services were hospital inpatient care (99231), critical care (99291) and hospital inpatient care (99223).
Show 4 more questionsShow fewer questions
Where did Dr. Joshua Ruben Damian go to medical school?
Dr. Damian graduated from University of Arizona College of Medicine in 2014.
What drugs does Dr. Joshua Ruben Damian prescribe most?
In 2017 Medicare Part D data, Dr. Damian's most prescribed drugs by claims were Oxycodone-Acetaminophen.
Has Dr. Joshua Ruben Damian received payments from drug or device companies?
CMS Open Payments shows $1,175 in general payments to Dr. Damian from 8 companies from 2016 to 2024. The largest total came from Allergan Inc.
How long has Dr. Joshua Ruben Damian been practicing?
Dr. Damian graduated from medical school in 2014, 12 years ago.
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