Pain, unspecified
In General symptoms and signs (R50-R69), chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings
- R52 is an unspecified code: use it only when the record doesn't document anything more specific. If the record has more detail, check the other codes under R50-R69 below.
- As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.
- Doesn't count toward a Medicare Advantage risk score (no HCC in V28).
- AHRQ's Chronic Condition Indicator classes it as not chronic (an acute or short-term condition).
- More than 14 US deaths in 2024 had an underlying cause in category R52, per the National Vital Statistics System on CDC WONDER. Death records use WHO ICD-10, so the count is for the whole category.
Also indexed as: Pain; Pain, acute; Pain, generalized NOS
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Instructional notes
Includes: conditions that are coded here
- Acute pain NOS
- Generalized pain NOS
- Pain NOS
Excludes1: not coded here, use a different code
- acute and chronic pain, not elsewhere classified (G89.-)
- localized pain, unspecified type - code to pain by site, such as:
- abdomen pain (R10.-)
- back pain (M54.9)
- breast pain (N64.4)
- chest pain (R07.1-R07.9)
- ear pain (H92.0-)
- eye pain (H57.1)
- headache (R51.9)
- joint pain (M25.5-)
- limb pain (M79.6-)
- lumbar region pain (M54.5-)
- pelvic and perineal pain (R10.2-)
- shoulder pain (M25.51-)
- spine pain (M54.-)
- throat pain (R07.0)
- tongue pain (K14.6)
- tooth pain (K08.8)
- renal colic (N23)
- pain disorders exclusively related to psychological factors (F45.41)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers when to report symptom, sign, and abnormal finding codes (R00-R99), plus specific rules for falls, coma scales, non-infectious SIRS, death NOS, and NIHSS scores.
- Use of symptom codes (page 75)
- Use of a symptom code with a definitive diagnosis code (page 75)
- Combination codes that include symptoms (page 75)
- Repeated falls (page 76)
- Coma (page 76)
- Functional quadriplegia (page 76)
- SIRS due to Non-Infectious Process (page 77)
- Death NOS (page 77)
Other codes under R50-R69
General symptoms and signs (R50-R69)
- R50Fever of other and unknown origin
- R51Headache
- R52Pain, unspecified(this code)
- R53Malaise and fatigue
- R54Age-related physical debility
- R55Syncope and collapse
- R56Convulsions, not elsewhere classified
- R57Shock, not elsewhere classified
- R58Hemorrhage, not elsewhere classified
- R59Enlarged lymph nodes
- R60Edema, not elsewhere classified
- R61Generalized hyperhidrosis
- R62Lack of expected normal physiological development in childhood and adults
- R63Symptoms and signs concerning food and fluid intake
- R64Cachexia
- R65Symptoms and signs specifically associated with systemic inflammation and infection
- R68Other general symptoms and signs
- R69Illness, unspecified
R52 MS-DRGs
As the principal diagnosis, R52 groups to MS-DRG 947 or 948 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Related conditions
Grouped by AHRQ's Clinical Classifications Software Refined (CCSR), which sorts every diagnosis code into clinically meaningful categories.
R52 is in Other general signs and symptoms (SYM016, its default category), with 58 codes. Others in it:
Medicare coverage articles listing R52
These 4 Medicare billing and coding articles list R52 as a diagnosis that supports medical necessity for the services they cover. From the CMS Medicare Coverage Database; check your own contractor's article before billing.
- Pharmacogenomics Testing (2 contractors)
- Removal of Benign Skin Lesions (2 contractors)
- Continuous Peripheral Nerve Blocks (CPNB)
- Pharmacogenomic Testing
Other codes that refer to R52
Notes on these codes point to R52.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Pain
Pain is a signal in your nervous system that something may be wrong. It is an unpleasant feeling, such as a prick, tingle, sting, burn, or ache. Each person feels pain differently, even if the reason for the pain is the same. Pain may be sharp or dull. It may be mild or severe. Pain may come and go, or it may be constant. You may feel pain in one area of your body, such as your back, abdomen, chest, or pelvis, or you may feel it all over.
Read more about pain on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 338.19 Other acute pain (approximate)
- 780.96 Generalized pain (approximate)